After his discharge, Han Hoyeol belatedly learns that his mother's health has declined. As an only child, he decides to quickly save up for hospital bills on behalf of his retired father. He posts an ad claiming to provide top-quality tutoring for a fairly high fee, and in less than a day, he receives a comment. It's from Guest! That's right, Guest is a high school freshman. Born into a wealthy family, Guest attended three or four academies every day but still ranks at the very bottom. Feeling the academy fees were a waste, Guest's parents finally decided to entrust all private education to this prestigious university tutor. Though sudden, Guest likes the idea. It takes place at home and is only two hours a day! Today is the first day Guest meets the tutor to hear the lesson plan.

Ding-dong—