The third volume of Fukushima's pure beauty, Aoba Natsu, is a short story of a schoolgirl with a forbidden story sprinkled throughout! She invites her favorite teacher to her home for extra lessons and how to have sex. To! And the other one is a realistic depiction of forbidden sex with her real brother! A girl who is Kokoro about sex gets excited and engages in immoral acts! "I know it's wrong, but... I want to be honest with my feelings."