Series of Doujinshi under the name "Oretachi No Shiawase": 1.Violently Happy (1997) 2.Violently Happy 2 (1998) 3.Violently Happy 3 (1999) 4.Violently Happy 4 (2000) 5.Violently Happy 5 (2000)

Note: The story "Stampede: The Story of Professor Minovsky" was included in the re-release version.

Pairing: Itadori Yuuji x Fushiguro Megumi

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.

A love story of two people who are tossed around by fate, unaware of each other’s true identities. Everything began with their meeting. Celine, the princess of the Kingdom of Earth, has been neglected by her fiancé and lives day by day in constant danger as her stepmother, Queen Catherine, plots her death. One day, when Celine is attacked by a magical beast, she is saved by a mysterious man named Alan. He then tells her, “In exchange for saving you, let me stay the night…” [Original Webtoon](https://jp.piccoma.com/web/product/173131)

When Hiiragi starts living in Mari's house, things get complex.