This is unironically one of the best nsfw games I played. However, I have found a bug I believe. I'm currently on the newest version (5.7.2) and it says to unlock Busty Adult Ilulu I have to play her for 12 more seconds. First of all, 12 seconds seems to be a little too low and if you play her for 12 more second or even like 10 minutes nothing happens. I hope you'll fix that, if so please respond so I know you fixed it :)
Edit: Nvm 10 minutes seems to have unlocked her. You should still change the description tho