Sonoda, who loves making money and having sex, has been engaged in “cock life,” in which he gives nicknames to the “cocks” he has seen and ranks them. One day, however, he suddenly awakens with the supernatural ability to see through cocks, and because of this, he can no longer have sex! He confides in her friend Yuzuno, the only one he can talk to honestly, and tries to have sex with him, but ......!

Based on Gaston Leroux's "The Phantom of the Opera."