Mark begins the summer after his junior year with an unpaid internship and no other plans. But when he agrees to go pick his baby niece up from her music lessons, her teacher, Jeong Jaehyun, catches his eye. Too bad he's off limits, and not just because Mark's niece is involved. Jaehyun is 41 to Mark's 20. To sate his curiosity about older men, Mark decides to look into becoming a sugar baby. He could use the money, after all. And he seems to find a willing patron right away. But for the first time in Mark's like, he finds he might be in over his head.