At the end of the summer in their senior year of high school, Yeonwoo and Dojin, who have been childhood friends, end up living together for about two weeks due to an unexpected house renovation. Dojin, who has secretly harbored feelings for Yeonwoo, becomes anxious about whether his emotions will be revealed. As he struggles to hide his feelings, he grows increasingly frustrated with the reality of not being able to confess to her. Then, one day, a new student, Baekha, appears beside Yeonwoo, and Yeonwoo starts to open up to him, drawn to his warmth and kindness. Watching them interact, Dojin begins to feel emotions he has never experienced before and finds himself caught in the confusion of jealousy and desire.