Ha-Ji, who tutored students as a side job, ends up tutoring Il-Do, a wealthy student retaking the college entrance exam. One day, she receives shocking news from her younger sister.

“Sis, did you know... Il-Do is actually a junior of mine at university?”

It turns out that Il-Do, whom she thought was a student retaking the college entrance exam, is actually a junior at Korea University who has already been accepted. From the day his true identity is revealed, Il-Do’s meticulous schemes and relentless obsession begin to slowly tighten their grip on Ha-Ji’s life.

(Source: Naver, translated)