As summer comes to a close in their final year of high school, childhood friends Yeonwoo and Dojin find themselves unexpectedly living together for a couple of weeks due to a house renovation. Dojin, who has secretly developed feelings for Yeonwoo, becomes increasingly anxious about the possibility of his emotions being discovered. While he tries to suppress his feelings, his frustration grows as he realizes he cannot confess to her. One day, a new student named Baekha appears by Yeonwoo's side, and Yeonwoo starts to connect with him, drawn to his kindness and warmth. Observing their interactions, Dojin experiences unfamiliar feelings and becomes tangled in a mix of jealousy and desire.