In ancient China, the Shin dynasty started a project to document all of the secrets of love and sex. The book was finally completed in the 16th century but it was lost during the war and only the legend of it remains. But it was said that whoever possesses this book will be the master of sex and attract anyone.

Mikekado Monjiro has been harassing Kozumi Saeka to be his girlfriend for the entire school year. When everything he can think of fails, he turns to a mysterious book that he finds in the storage area of his dad’s natural remedies shop. It lists recipes for weird spells like love potions which Monjiro half heartedly creates only to find out the effects of it are beyond his imagination.