Suggestive talk one episode about what classmates are doing on the roof (These classmates are thought to be lovers, but in reality aren't).

Girls often have large busts.

In one odd scene in an episode, a younger girl grabs another the main female lead's breasts legitimately impressed by the size (Also known as fanservice).

Dog savagely beaten, before having its neck snapped. Lots of blood.

Other than that, there isn't any blood in the series, only some intense fighting between characters.

Bombs are released on a busy city.

None. (If any, it is barely even seen on screen)

Most of the fight scenes can be intense, but most of the violence is done to villainous characters.