15-year-old Young-sun, abandoned by her adoptive parents and left with nowhere to go, temporarily stays at the home of Sua, whom she met as a tennis training partner. Young-sun, wanting to stay at Sua's house for a long time, tries hard to become part of the family, but Sua and her family find Young-sun burdensome.
Young-sun
Sua
Seong-woo
Ji-yeong
Gi-ho
Nun
Coach
Jin-hak
Hwa-yeong
Se-ra
Yeong-seon's Father
Yeong-seon's Mother
Kyeong-ho
Sang-hyeon
Gi-yeong
Aunt
Peer Student
Orphanage Child
School Parents