For most parents, their child's teenage years are just as bad, if not worse, than the terrible twos. But for Sachiko and Masato Azuma, the situation is further complicated by their son Hikaru's autism. As puberty strikes, Hikaru's growing sexual awareness creates uncomfortable and embarrassing situations, and begins to affect his little sister, Kanon. The already-taxed Sachiko must find ways to alleviate the situation, while being mindful of the effects...