Mai, a rising J-Pop idol, is finally about to have her big break when she unexpectedly falls in love. But in a treacherous industry where young singers must maintain an image of flawless purity, love is forbidden. When her relationship is exposed, Mai's agency takes drastic action, dragging the couple to court over the "no love" clause in her contract, throwing her life into chaos.

The story follows So-hee, a 14-year-old Zainichi Korean girl. She goes to a Korean school and devotes herself to Korean traditional dance as her school club activities. One day, at an exchange event with a Japanese school, she befriends Mirai, a Japanese girl who shares her love of K-pop. Through this encounter, So-hee gradually begins to connect with the world beyond her own. As their friendship deepens, the two decide to sell unused items from So-hee's home on a flea market app to earn money for their favorite K-pop idols live tickets. One item fetches an unexpectedly high price-a North Korean CD, which is So-hee's father's. Sanju, the father, is the principal of a Korean elementary school. Emboldened by this success, So-hee and Mirai take it a step further, eventually selling even the medal that Sanju had been awarded by his homeland, North Korea.