Naughty Boys(2002)

Overview:

Gacchan is marking his birthday and his partner Takayuki is waiting for him at home so they can celebrate. However, not only does Gacchan forget about his partner but he is also flirting with others in the hood. Takayuki leaves their apartment and embarks on a night journey that will lead him to cheat on his partner. Will they be able to rehabilitate their relationship?