Junjou Decamelon / Pure Decameron is a hentai anime adaptation of Kotoyoshi Yumisukes manga of the same name. The storys protagonist Hoshiya-kun has recently moved to Tokyo. He loves the stars and often watches them in the park. Once he met a tall girl who was naked under her coat. Soon he met her again when she transferred to his class. The girls name was Kaeko Momota and she explained her strange act to the hero. And all because of her