Few updates about the game from the comment section:
-Clarification on a previous statement, there is NO pregnancy/childbirth shown in Prostitution or Cosplay it looks like, and while they're sticking with the current systems for it, additions maybe be considered.
-Buta also clarified dialogue/scenes not related to H material will not be cut in the development process to get the game shipped sooner. Every time you defeat a boss, certain characters dialogue will change, many of which have nothing to do with eroticism. They also suggest to change your age and walk around naked while chatting as well, likely meaning age and outfit also changes dialogue with characters.
-The confirmed costumes for cosplay are Bridal outfits, Small devil costumes, Gothic Lolita, and two more as of yet not revealed outfits.
-The character "Kirin" will have more scenes that Shi (likely in reference to her screen time the first game).Someone who knows Japanese a bit better than me could answer this but is Kirin the name of the female character from the start of the current demo?
-There seems to be 2 shotas for the prostitution phone calls
-There is no compulsory H event in the main story necessary to progress, unlike the first game where you needed to get trapped to enter the castle, so you could in theory go through the whole game without doing a single H event...not sure WHY you would do that given the game you'd be playing but it's apparently possible lol