Many scenes of two teenage boys kissing with varying levels of passion.

A teacher sensually caresses a teenage boy's face and tries kissing him. It's ambiguous whether this is consensual on the boy's part.

A teenage boy caresses another's back under his shirt.

A teenage boy asks a teacher for advice on sex.

A man is hit in the face an blood is seen later driping from his face (for comedic efect)

A few scenes showing any male character being hit in the head, in a rather comical matter.

A man slaps another man in the face.

Characters yell at other characters, but nothing particularly intense.

3 uses of "damn" and one use of "hell" in the official subtitles.

There may be some mild Japanese profanities.

The main teacher often smokes. He gives one of his students a cigarette at one point, though the student doesn't smoke it.

There's a scene at a bar where many characters are seen engaging in alcohol consumption. One of the main characters drinks beer and gets drunk.

None, unless you can't stand gay relationships.