Han-cheol, along with his gang, Geon-mo and Min-ho, tries to be the best in second grade. One by one, they beat out the talented second year students as if beating dojo masters. Han-cheol learns about a master, Jin-man, through a video. Without any idea what is going on, Min-su, wanting to practice finds a boxing ring where Jin-man also practices, and so begins to sleep with the two enemies. However, they need each other so they avoid their uncomfortable jealousies.

32-year-old Siheon, a delivery worker at Eurwangni Beach, is soon to be a college student. One day, as he is congratulated by the aunties at the restaurant, a Japanese man approaches and informs him his mother is dead. 30-year-old Ryota is the son of Siheon’s mother who left young Siheon and have a new family of her own in Japan. The brothers who met for the first time and Siheon’s friend Yejin head to Siheon’s old house in Chinatown where his mother’s trinkets are buried.