The English-speaking Ren Ai Game community has too many examples of games which only had demos, or which never amounted to more than ambitious plans.
The second decision which will shape your game: Who is your main character, and what is their sexuality?
The following options will make a huge difference: Any of the above could conceivably be crossdressers.
Any of them could have one or more transgender people or bifauxnen as potential love interests.
Strive to add distinct elements to your game/story which will be obvious from the very first scene. It's possible to create a multi-path game with an Official Couple.
This might even make the other characters Pretty Freeloaders.
Or perhaps you want to mix some relationship elements into your mainstream video game. The first decision you make will unlock a major Event Flag for your story/game: If you're not creating a product with the intention of selling it, then know what you're getting into.
Do not talk about your awesome plans until your project is almost finished.
You should ask questions such as, "Why would anyone like this person?Instead, write a few scenes, or get some of your gameplay to work.Then set a realistic deadline for yourself, and don't change it.However, there is reason why Dating Sim use this character less and less.Mary Sue: if your main character is female, some fans may be quick to label her a Mary Sue, or as some sort of stand-in for Fangirls. Just show the audience that she has plausible strengths and real weaknesses.Perhaps you are interested in creating a cute story in which the main character can end up with one of several love interests.Maybe you want to prove to the world that you can make a full-blown Dating Sim without problems like illogical choices (or gratuitous sex)." Remember, it could get worse — if your story involves horror/dark themes, and if your main character is doing horrible things, then your audience may want to see themselves as anyone but that character.Note that Featureless Protagonist is exception to this.Likewise, many commercial games have a Slice of Life setting.If your setting is realistic, then make sure you can portray it in a way that the audience will find interesting.