Passed more than two weeks since the party event, but I never got "Talk about sex" when I visited best friend's room. I play as a male, and she is a female. I didn't drink cum at the party event, failed the skill check, and she saved me (dunno if this info is needed). Btw, I actually got that option once, but it was long before party events.
I saw "open relationships" in the roadmap, but is it gonna be possible to make a harem? Basically, your partners will be exclusive to you while you are not. Please add this if possible.
Virginity of npcs should also be tracked.
While generating the world some types of npcs should be more common than others for realism. For example, there are a lot of female npcs with very short hair, while in real life, longer hair is more common for females. Things like these should be taken into consideration in character generation, imo.