Despite wanting a quiet reborn life, this former college girl levels up to the max as the villainess.

Follows Oliver Horn as he enters a prestigious magic school named Kimberly. He discovers that not everything is as it seems, with the emergence of labyrinths, monsters, and other threats that endanger the students.

For a high school project, an introverted boy and an outgoing "gyaru" have to pretend to be married — and neither of them are happy about it.