Violence / Gore: Sentarou gets into fights a good number of times, Kaoru a few times. Bruised/scuffed faces are about the worst shown.

Nudity / Sexual Content: The main characters go to the beach and the guys swim in their underwear, nothing more is shown than had they been in regular swimsuits. They're also seen in their underwear when having a medical check-up at school. When Yurika is introduced she's getting harassed by some guys. Yurika's parents assume she is having sex Spoiler: with Jun. Ritsuko accidentally sees Kaoru in the bath and they have a conversation through the door, he has towel/water cover. Some guys bully Kaoru and threaten to leave him tied to a statue with his pants down. Two instances of a girl being pushed to the floor by a guy, but it goes no further.

Theological themes: I was really pleasantly surprised concerning this, as both Ritsuko and Sentarou are Roman Catholic and attend church, I assume regularly, it's shown about twice in a show. Sentarou wears a rosary around his neck. It's not really discussed or expanded on in any way but it's nice to see characters portrayed as normal Christians in anime. There's one more point here but it's a pretty big spoiler for the last episode so you can PM me if you really want to know. It's a positive portrayal in the same vain as what's already been mentioned.

Negative Themes: Instances of swearing and alcohol consumption. Jun smokes, but stops Yurika from starting. There's one occurrence of racism where a drunk guy demands to listen to "white" jazz.