I have a question, do you need to be a certain weight or have a certain amount of muscle to date certain characther
[Spoilers]
Certain characters do have requirements like Jim you need to have a muscle of 6 to get the nsfw scene. And for oken you need to be at a certain weight like around 190s or 200s to get his. As for Ian and ryan they dont have requirements, but you need to see ian after his first sumo match and for ryan you need to help him move his things into the student dorm. As for the other characters, choose the option to stay when meeting zuil for the second time(when he is in the clinic for you to get that document for swimming). For zac, just go get in the shower when the mc says he needs one during the first week. As for shaun, pi, lacky, and legan they might still be work in progress or you need to be in specific locations to trigger the nsfw scene. other than this, this is all i know for now. Comment if i missed anything.