The Summer Demon ~Toilet Bound Girl Hanako-san~ (夏の魔物～地縛少女花子さん～ Natsu no mamono ~Jibaku Shōjo Hanako-san~?) is the seventh chapter of the spin-off Houkago Shounen Hanako-kun.
Summary[]
Hanako has been turned into a girl by a strange device, which will last for about a day since she defeated the device. Yashiro excitedly suggests doing girl-like things, starting with an outfit change to a bobbed cut and red skirt (as in the original Hanako-san legend). She then styles their hair to match, and Hanako has just decided to show it to someone else when Kou arrives. He's confused, initially assuming that the unknown girl is Hanako's elder sister until they explain the situation. Hanako then flirts with him, asking if he finds her cute, but Kou says no as she's not his type. Hanako is devastated as Yashiro consoles her.