Go Young, a gay Korean man, lives with Choi Mi-ae, a straight woman. Through Mi-ae's eyes, Go Young embarks on a journey of personal growth. He struggles with his relationship with his mother, who's in denial about his sexual orientation, and is forced to part ways with his lover Gyu-ho due to societal pressure. Recovering from his breakup, Go Young takes a trip to Thailand with a stranger, and manages to learn more about himself in the process.

故事从一次意外的撞衫事件展开，同月同日生的两人不只爱上了同一个男人，还经常买了同一款服饰。年轻时曾互为情敌，10年来一直透过脸书的蛛丝马迹，幻想对方活得更好而感到嫉妒，没想到却意外重逢。