During class, the busty, beautiful half-Japanese teacher "Meisa" gets angry when a student repeats a string of obscene words while reciting aloud, and slaps him. When her fellow teacher Sakurai tells her that the student's strange behavior is due to a hypnotism that started as a prank by the classmates, Meisa doesn't care at all, but one day she herself falls into the trap of the hypnotism. Later, the students use Meisa's behavior as a topic to approach her, but what is their true purpose...?