From Fujoshi Bitches:

As a good-looking university student, Atsushi freely enjoys purely physical relationships. He believes the likes of serious love to be nothing but trouble… until he watches his friend Niinobe masturbating. Alone together in the swim club clubroom, Atsushi feels an urge he has never felt before for the guy releasing himself and who pleads to him,”I want you to watch my debauchery, with an enticing look on his face.

From Renta!:

Campus hottie Atsushi thinks love is nothing more than a waste of time... that is, until he discovers his friend Mizuki's big secret! Alone tog... More...

From Fujoshi Bitches:

As a good-looking university student, Atsushi freely enjoys purely physical relationships. He believes the likes of serious love to be nothing but trouble… until he watches his friend Niinobe masturbating. Alone together in the swim club clubroom, Atsushi feels an urge he has never felt before for the guy releasing himself and who pleads to him,”I want you to watch my debauchery, with an enticing look on his face.

From Renta!:

Campus hottie Atsushi thinks love is nothing more than a waste of time... that is, until he discovers his friend Mizuki's big secret! Alone together in the men's locker room, Mizuki begs Atsushi to observe him as he touches himself. After agreeing to watch, Atsushi finds himself feeling something he's never experienced before... Less...