Some short instances of characters bathing, no sex or revealing nudity.

Magazine of girl with bikini.

There are a few scenes where a female character finds a male character's magazine of women wearing revealing bikinis. The male character is embarassed by this. The scene lingers on the magazine cover which could make younger viewers uncomfortable. No nudity is shown.

Some of the scene angles emphasize female character's bosoms. Young viewers could find some of the scene angles awkward due to the emphasis on breasts.

There're scenes in multiple episodes where the characters are featured in bikinis.

The main boy is constantly hitting the main girl's top of the head and she falls down to the ground with tears in her eyes it's not very hard and sometimes it's meant for laughs.

There are some fantasy violence in this anime series. It's not really "fantasy." The violence isn't really happening. It's only in some people's minds who are infected with Chunibyo simliar to daydreaming

Rikka is hit countless times by Yuuta.

A bit of interpersonal violence (a boy repeatedly raps a girl on the face with the back of his hand)

Bi*** is clearly used so is a**

When characters are angry, the characters may say d**m, and hell.

The last two episodes of Season 1 is extremely depressing and very hard to watch.