On the day of the entrance ceremony, the moment Mitsuru Todo saw the school's sign, he regained his memories of his previous life.

He realizes he had been reincarnated into his favorite romance game, only to find he was an incredibly villainous character.

What's more, he inadvertently ruins the event where the protagonist and heroine are supposed to first meet.

Subsequently, he struggles to avoid his ruin, but as a result, he ends up being excessively doted on by the heroine.

And not just her—even mob characters, teachers, his younger sister, and the principal?!

A colorful cast of characters appears, including a yandere main heroine stalker, a delinquent yankee gal, and an obsessive female otaku.

This is a story about a protagonist who, reincarnated as a villain in a game world, utilizes his knowledge and experience from his previous life to avoid his fated ruin and struggles to live a happy youth.