A teacher with zero training in the Hanging Class

A girl who spends money like water, she is a patient with severe depression. A girl who can break a mountain with a sword, she calls herself a loser. A girl who is as beautiful as a fairy, she says no one will marry her. A "boy" who loves to sleep, he says he is invincible. ... A young man who can't remember his own name came to this class to teach, he thought his life should be ordinary, but reality always wants him to do something earth-shattering.