I'm 99.9% sure it's a modded koikatsu for the prologue. However, I would not recommend buying the game on steam as it's censored and limited. I found the modded version and started to work on my game. I'm not sure if Komi is still using it for chapter 1 though.
Thankyou, I'm gonna need it. Modeling and posing is surprisingly time consuming. Never going to be surprised that a game hasn't been updated in a while again.
