All the dependencies and requirements listed above in the Requirements tab.

ORomance Plus is platform agnostic of ostim versions. Only choose one!! The setup for either Ostim, Ostim NG, or Ostim standalone:
Ostim: OStim Installation Guide - Start to Finish at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com)
Ostim NG: The updated OStim NG Installation Guide at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com)
Ostim standalone: OStim Standalone Installation Guide at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com)

Either Ovirginity or Ovirginity Reflowered, depending on what Ostim platform you're on
OVirginity at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com)
OVirginity Reflowered at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com)

(YOU NEED THE ORIGINAL OROMANCE MOD) Original ORomance: ORomance at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com) 

The appropriate animations pack depending on your Ostim version, which is listed in the guides above.

 A PICTURE IS WORTH A THOUSAND WORDS:

Plugin order

Mod order



LOOK ABOVE AT THE REQUIREMENTS TAB SECTION TO SEE THE REQUIRED MODS.

• install IWant Widgets (you can install IWant Widgets NG on top as well), make sure you have its requirements (SkyUI)
• Install ConsoleUtil
• install Papyrus Extender
• install Papyrus Tweaks
• install PapyrusUtil 
• install Ostim, or Ostim NG, or Ostim Standalone and their respective requirements. FOLLOW THE OSTIM GUIDES LISTED ABOVE
• Install OVirginity or OVirginity ReFlowered
• install ORomance (MANDATORY, YOU DO NOT NEED OSA) 
• install Oromance Plus (ensure it's overwriting ORomance - loaded after)
• install optional ORomance Plus patches (Choose only one OpenAnimations patch depending on which ostim ver you're on and which animation set you're using i.e. Open Animations NG or Open Animations Standalone.)
• Install your animation packs (i.e. Open Animations Romance and Erotica a.k.a. OARE). Run Nemesis whenever adding or updating animations.
  

Upgrading from previous versions of ORomance Plus is generally safe, if not it will be mentioned.

NOTE: going from Oromance to Oromance Plus in an existing save will cause issues, due to the many changes of systems.  If you are willing to risk it, you can do a clean save method to remove ORomance and then re-add it along with ORomance Plus. 
This method is listed here under FAQ : ORomance at Skyrim Special Edition Nexus - Mods and Community (nexusmods.com)

1. It uses the IWantWidget's UI which separates it from the vanilla dialogue tree.  So many mods use the vanilla dialogue tree that it can get extremely cluttered, and make certain NPCs who typically don't have any dialogue options (guards, etc.) say their idle lines less.

2. The relationship mechanics are much more complex and depend on your own personal achievements as the player  character such as Faction questlines, the main quest, your speech level, your overall level, how many houses you own, how many thaneships you possess, and much more.

3. Each NPC is given a generated personality, such as their sexuality, prudishness, promiscuous-ness, etc.  This system can then be configured in-game via the ORomance Plus Stat Editor mod, or via the ORomance Plus SPID and OAR mod, which one can then configure custom animations on said NPC personalities.

4. It works on all Ostim Platforms

5. Improvements to the marriage system such as divorcing, breaking up, polygamy, supports some other popular marriage mods like 'Immersive Rejections', and eventually additional weddings for polygamy (in a future version)

How it works
To start ORomance, simply approach an NPC and press the ORomance hotkey while facing them. This will start a special dialogue with the ORomance menu available. You now have many options available to you

Romance
- Try to seduce
If you succeed, you the npc will ask you to lead them to an area to have sex in. Press the ORomance key on the NPC while they are following you to start the OStim sex scene.

Typically, approaching random NPCs and trying to seduce them will fail unless your speech stat is extremely high. Some (but not all) NPCs much prefer that you start a relationship with them before they will have sex with you. Some NPCs, do however, prefer being a friend-with-benefits, and will let you seduce them long before they will agree to a relationship with you.

-Try to kiss
If you succeed, you will kiss the NPC. This makes them like you quite a bit more, and therefore will make other actions easier to perform after this. 

Most NPCs will prefer to kiss you before they agree to full-on sex, but some of them aren't a fan of lovey-dovey stuff, and will prefer to just have sex.

- Prostitution
For when you need a quick fix. This only appears if an NPC is a prostitute. For example, tavern wenches are prostitutes. Other NPCs are marked as prostitutes as well, so ask around
You can select if you would like a handjob, blowjob, or full control. The options get more expensive depending on which you pick.  You can expect to pay a few hundred gold at least

Interact
- Inquire
- Ask about sexual experience
The NPC will tell you about their sexlife and/or thoughts on sex. You can get some information about them and their personality type based on their response. If an NPC is not familiar with you at all, they may refuse to answer.

- Ask about current relationships
The NPC will tell you if they're married or single

- Ask about sexuality
The npc will tell you their sexual preferences. If an NPC is not familiar with you at all, they may refuse to answer. 

- Relationship
-Confess Love
This will ask the NPC to become your boyfriend or girlfriend. Some NPCs are more comfortable with this than others. After an NPC is in a relationship with you, they are far more likely to be down for things like sex and kissing if they weren't before. Be warned though, if they see you getting physical with someone else, they will get angry with you and possibly break up

-Propose marriage
If the NPC accepts, this will start the vanilla wedding quest with them.
A small minority of NPCs will not have sex until marriage. NPCs that are married to you will do just about anything with you. Be careful though, if they see you cheating they can still divorce you

- Divorce/breakup
Does what it says. NPC will hate you afterwards. May be impossible to get back with them after this, so choose wisely.

- Give gift
"AAA YES I CAN'T WAIT TO GIVE EVERYONE I WANT TO SEDUCE 20 DIAMONDS AND WIN THEM OVER INSTANTLY"
Not how this feature works. Giving NPCs small gifts will temporarily boost how much they like you. The amount that it can boost is capped pretty low if the NPC is not your partner or spouse, so don't go wasting 1000 septim gifts on random NPCs.

-Compliment/insult
These give tiny boosts to how much an npc likes or dislikes you. Spamming them will make an NPC get annoyed with you. More effective if an NPC is already your partner or spouse

Skyrim's relationship system, versus ORomance's
Skyrim has a rudimentary relationship system, where NPCs have a number assigned to them that essential represents what they think of you. It ranges from -4 to 4, with -4 being an enemy, 0 being a stranger, and 4 being a lover. This system was not nearly advanced enough for what ORomance wants to do, so many new stats were added to the game, including but not limited to:
- How much an NPC likes you
- How much an NPC desires sex
- How much an NPC is willing to talk about sex in public
- How much an NPC wants to be in a loving relationship
- If an NPC is willing to have sex with you before being in a relationship, or married
- How much an NPC is willing to cheat if they're married to another NPC
- How much an NPC hates you
- How much an NPC loves you
- Other seduction difficulty modifiers based on their status and who they are
- More

ORomance still keeps track of vanilla's relationship system, however. So things that affect the vanilla system will affect ORomance and vice versa, for compatibility!


Player Charisma 
The number 1 thing that determines generally how successful you are at starting relationships and seducing NPCs is a hidden stat called your charisma. Your charisma is tied to your actions throughout your playthrough of Skyrim. Having very low charisma means you will be able to get almost nowhere with most NPCs. With an average/medium charisma value, you should be able to start consistently having success with NPCs that you spend time interacting with, traveling with, or doing quests for, depending on their stats and what they like. High charisma characters will be able to sometimes seduce NPCs on first meeting them.

What affects your charisma? The following things increase your charisma stat, from most to least (roughly):
- Increasing speech
- Leveling up
- Becoming a thane in an area (is extra effective with NPCs that live in that specific area)
- Purchasing and owning property
- Ending the civil war/killing alduin.

Remember though - charisma is only half of the equation. An NPC's personality stats, opinions of you, preferences, marital status, and much more heavily affect your success with them. See the getting started section down below for more info on playing effectively. 

Seduction and kissing 
If an NPC agrees to have sex with you, they will allow you to lead them to a private area of your choosing. Opening the ORomance menu on this NPC while they follow you will allow you to begin the OStim sex scene.

You can also perform a kiss with an NPC. This has a very positive effect on your relationship with said NPC. Thanks to it's versatility, kissing animations are processed and managed by OStim. 

You can also start a threesome. To do this, seduce an NPC while one is already seduced and following you. Note, if you are in a relationship with one or both NPCs, the threesome will fail unless both NPCs have a personality that is OK with cheating. Starting threesomes with NPCs that are not in a relationship with you works best.

Success and failure
Normally, there's no indication that an ORomance action will succeed or fail (other than what you've inferred from Inquire and such). However, once an NPC becomes your partner, OR your speech level reaches level 50, you will gain the ability to loosely tell if an action will pass or not. This is indicated by selecting an option, then checking the color of an NPC's name at the bottom of the screen. The colors indicate the following:

Red - This action will no doubt fail
Yellow - This action may fail or succeed. If it fails, that NPC is "on the fence" about you, so you are somewhat close. Remember there is no RNG in these options, so if something is yellow, don't spam it, it will not succeed by doing it over and over again without changing anything
Green - This action will definitely succeed 

Since failing most actions gives you a temporary dislike penalty with that NPC, gaining this ability is very useful.
A colorless indicator is available in the MCM if you have trouble seeing the colors

Cheating
If one isn't enough for you, you can always choose to sleep around. You can also steal some NPCs spouses.

Player cheating
You can have as many girlfriends and boyfriends as you like. However, if one of them sees you getting physical with someone else, they will usually get angry and sometimes break up with you. NPCs that do not care much for monogamous relationships may not care and give you a pass, but these NPCs are rare.
When an NPC is angry at you, via cheating, insulting them over and over, or something else, you will not be able to interact with them and will have to wait for them to forgive you, or apologize to them over and over. Some NPCs may never forgive you.
If you want to do a harem type playthrough, you can seduce NPCs without making them your boyfriend/girlfriend. Doing this lets you freely have sex with them in from of each other. However, seducing NPCs without starting a relationship with them is more difficult (but entirely doable)

Stealing other's wives/husbands
Married NPCs are usually in a happy and satisfactory relationship. Seducing these NPCs is not realistically possible. It is technically possible to have a relationship and/or seduce any NPC if your player charisma is high enough. However, the level required to seduce most of these NPCs is not attainable for all but the longest running player characters. 
BUT. Some married NPCs (less than half, more than 1%) are willing to cheat if the right player comes along. Furthermore, some of these married NPCs are actually looking to cheat, and seducing them may be especially easy. Be careful though, if their spouse catches you in the act of having sex with their wife or husband, they will most likely get extremely angry. Fortunately most NPCs will refuse to start sex if they know their spouse is around (ultra horny NPCs don't care and will start sex regardless).
You can start relationships and even get married to these cheating NPCs, but it is even more difficult than seducing them. Killing a married npc's spouse makes them easier to seduce as long as you aren't caught. 

Opinions and memories
When interacting with an NPC, you may see one of two little icons pop up at the bottom of the screen. These either indicate that the action you tried to perform was successful or failed, or the NPCs opinion of you has gone up or down. Or both. Over many days, an NPC's opinion of you will slowly return to neutral. However, sometimes, some actions leave a permeant memory on the NPC these memories permanently affect the NPC's opinion of you.
Generally, being in a relationship or being married to an NPC makes it much easier to rack up "positive" thoughts about you. NPCs who you know casually will have less strong feelings towards you, but you can still leave permanent memories on them (i.e. having sex and giving them an orgasm).

Boyfriends, girlfriends, and marriage
With the Confess Love option, you can start a relationship with an NPC. Some NPCs prefer not to have sex before being in a relationship, so if you wish to have sex with those NPCs, you either need to form a relationship first, or have extremely high charisma.
You can also propose marriage to NPCs. Getting an NPC to accept that does not have a very high opinion of you, and also is in a relationship with you, is very difficult.

Inquiry
You can ask NPCs some questions about themselves, including their sexuality, if they're in a relationship, and their thoughts on sex. Their answers may help you guess how seducable they are. For example, married NPCs may sometimes comment that they are unhappy with their marriage (but they won't always, even if they are)! Quite often though, if an NPC doesn't know you at all, they will refuse to answer some questions you ask them.

Prostitution
Some NPCs are prostitutes. Whether or not they're a prostitute depends on their job. Tavern wenches, for example, are marked as prostitutes. Other types of NPCs are as well, but you will have to explore around to find them. Prices vary from prostitute to prostitute, and they also vary based on which sex act you select. When you select an act such as a blowjob, you will start a special, locked OStim scene that you can't control, and you will receive your service.

Sexualities
By default, all NPCs are bisexual. With the sexuality setting on, some NPCs are heterosexual and homosexual. It works about how you would expect - if an NPC isn't attracted to your gender, seducing them is basically impossible. So if an NPC isn't attracted to your gender, you pretty much can't do anything ORomance-related with them. You can ask their sexual preferences with the Inquire feature to find out what they prefer.
Percentage distribution is based off of real life survey data.

Ultra-tight OStim integration
Several actions you perform during OStim sex scenes can affect your relationship with an NPC.

Integration with other mods that start sex scenes
Let's say you have a quest mod that leads to you having sex with an NPC. Afterwards, as long as that quest played an OStim scene, ORomance will recognize this, and make said NPC easier to seduce for you, to keep immersion (otherwise, you would have a relationship with said NPC in the quest, but ORomance would not reflect that at all which would seem strange). 

Getting Started
Here are a few things you should know about the mechanics:

- There is no RNG in the success "rolls". That is to say, if you fail an action, repeating it immediately after, or savescumming and reloading will not affect the outcome at all.
- Low-level characters will fail. A lot. In fact, I recommend reaching level 5 and speech level 35 before even starting to try. Getting to speech level 50 is recommended. Enchanted gear that raises speech should work.
- Completing quests they offer is generally (but not always) the single best way to get an NPC to like you. Leveling up your speech is the second best, and works consistently across all NPCs. Travelling with them is also good if they are a follower.
- If an NPC is in a happy marriage, or if an NPC is not attracted to your character (i.e. a female character is a lesbian and you are a male character), you will probably not be able to seduce these NPCs. Technically, if your level and speech are high enough it is always possible, but it is not practical and may not be possible with vanilla level caps. 

In-depth guide
Here. This guide is for people that want to know the innerworkings of the mod. As a casual user I advise not reading this

Difficulty tweaking & the MCM
ORomance settings appear in the add-ons tab of OStim's MCM

Want a more laid back experience? Raising the difficulty modifier will make things easier. My personal recommendation is to do a full playthrough at the default difficulty, then tweak the difficulty, but you can do what you please. Here's roughly how some settings will translate:

0 - The standard. Early game will be tough. By midgame you'll be able to seduce a lot of NPCs that are familiar with you. By late game you should start being able to easily seduce most NPCs
30 - This will make things slightly easier, as well as let low level characters get started with ORomance fairly early on. Overall though, won't make things too much easier
60 - From here, low level characters can get started with ORomance right away. By mid-game, you should be able to seduce a pretty good chunk of NPCs easily
90 - At this difficulty, you'll be able to have quite a bit of success with a lot of NPCs even at level 1. By midgame you'll no doubt be able to seduce nearly all NPCs

Values above 90 will mostly be a cakewalk.
With higher negative values you may not seduce anyone at all until the very late game.

Controls
By default, K on an npc starts a dialogue and left/right changes options. These are changeable by MCM
Your normal skyrim controls select options, and exit the menu. By default this is going to be E and tab.

Controller supported.