Once every day, Jiwoon confesses his love for Sejin, a student at the same university. Sejin always turns him down, telling him that Jiwoon would not like his preferences. However, they eventually become lovers, after Jiwoon promises him that he will never leave him.

Jiwoon is happy to get close to Sejin, but Sejin starts revealing his secretive and sadistic preferences little by little. Inhyuk, Jiwoon’s friend who has had a secret crush on him, remembers Sejin’s past and worries for Jiwoon.

And so, Inhyuk starts a psychological war with Sejin while lingering around Jiwoon…!