Hiroshi admires his classmate Noboru, who continues to create erotic trends at school. From 'procuring' pornographic books to 'distributing' them among classmates... Noboru had somehow started being called the 'Ero Doctor.' One day, Hiroshi finally visits Noboru's house as he has long wished. Pornographic books are scattered inside... and Hiroshi meets Noboru's mother, Suzune. A few days later, Hiroshi finds himself alone with Suzune at the Yasugami household…
