Tsuda's girlfriend broke up with him because he has a big dick, now he's kinda upset about him since he doesn't really understand. Then finds a classmate named Oogami who's a werewolf, both of them seem to enjoy sweet things so they start hanging out. One day Tsuda goes over Oogami's home and stays the night over, then he notices it's a full moon that night, when coming out of the shower he encounters Oogami all flustered and in heat?!
Tsukiyo wa ecchi na okubyou ookami