Na Ri Mo No   なりもの♪

Miyako has a secret... that she has a cock. But she doesn't care about it, just enjoys sexually teasing Tomoharu, her childhood friend, with it. One day, when she sexually teases him as usual at a classroom after school, Miwa, a female teacher, sees it, and tells Miyako to stop it. Miyako gets angry, and decides to revenge on her. She gets a love drug, makes Miwa drink it, and takes some pictures of her being indecent. And then Miyako pulls down her skirt....