Manabe - kun is known to be a pervert and sometimes thinks about dirty thoughts about Kotoura - san, and as Kotoura - san can read minds we can see those thoughts. (there is no nudity, the only nudity in Kotoura - san is Kotoura - san's side boob in Manabe's mind).

A use of "damn" "hell"

We see someone about to whack a girls face but we don't see the person hitting the girl.

A second later we see a girl who has blood coming out of her head.

When the girl was going to get hit in the head she was saying ''I'm Sorry'' over and over again. This might be frightening for young viewers.