Some jokes about Kobeni's huge breasts

Mashiro (a 10 year old girl who looks 5) gives Kobeni (a high school girl) a spongebath, nothing explict except her bare back is shown

The beginning of the opening shows some sexual pictures of the characters

The oldest sister is a pervert-type character who chases a 10 year old around, teasing her and making inappropriate remarks

Benio (a older highschool) looks at a magazine for young girl's underwear, saying its in her younger sister's interest. This takes place after she finds her younger sister's underwear and greatly reacts to it

A character has a few nose bleeds