Behind Seo Seon-ui's harmless, gentle face lies a dangerous well of hidden violence. He manages to keep his volatile temper suppressed. That is... Until Ohn Juhyeok, a senior at his university, approaches him with a video capturing a brutal assault from Seon-ui's past.

Expecting blackmail, Seon-ui prepares for the worst, only for Juhyeok to make an utterly bewildering request:

"Could you hit me, too? Just like in this video."

Confronted by Juhyeok's incomprehensible and taboo desire, Seon-ui tries to keep his distance. However, he gradually finds himself drawn into a dark, twisted dynamic where pain and pleasure become inextricably linked.