He is not only a third generation chaebol but a top student with good looks that makes others do a double take. Do Hajun, one of Shin Sodam’s childhood friend, is strangely flawless. Sodam is secretly in love with Do Hajun, but... ‘He’s perfect; what would he want with me?' 'I didn't expect anything...’ While trying to clear his heart, during his final year at college, he discovered Hajun’s big secret by accident. "I can't do it without you." “Sodam, will you be my SM partner?” For some time, Sodam regretted being influenced by the room’s mood causing him to accept Hajun’s proposal. He doesn’t want to miss this opportunity, which may end his unrequited love. And SM play is surprisingly worth trying! However, the more nights he spends with Do Hajun, the more secrets behind his smile are slowly uncovered. Was Hajun always like this?