Hirayama Shigeru is given a devilish book that grants him the power of mind control.
After practicing how to use it and enslaving his classmate Kujou Chiharu, he faces another girl, Takamihara Mina, and makes a bet with her:
If she can figure out the three commands he has hidden in her, he will relinquish his mind control and free those he has enslaved.

Will Mina succeed?