Runpen Binta is the world's slowest manga artist, producing (maybe) one lolicon hentai per year. His idol is the rising star of lolicon hentai, Oozutsu Cannon. But when Runpen gets to meet his idol he's shocked to discover--she's a teenage girl. Cannon-sensei is so touched by Runpen's devotion she hires him on the spot as her assistant. But that means she has to use his house as a studio so her parents won't find out. And Runpen finds out he's to provide her with real-world education on sex!