Adult PC Game: NTR Academy 2 v1.0 by Atelier Sakura Archive

Overview:
Netri Academy is a private school.
For some reason, there are many girls with boyfriends at this school.
The main character is Kashiwagi Dankonmaru, a creepy, gay guy who goes to this school.
Dankonmaru is always being creeped out by the girls, but in fact, he has a natural talent that everyone envies.
He has a natural talent that is envied by all: he can have sex with the best of them. He is a very good sex man.