Mika Kimoto, a successful editor in Tokyo from a wealthy Korean-Japanese family, struggles with her father's demand that she marry only a Korean. After her relationship with her Japanese boyfriend ends due to his interference, she posts a message on a dating service. Ryosuke, a blue-collar worker, replies, and despite their differences, they connect. Mika then discovers her late mother’s diary, revealing her mother's secret romance with a Japanese man before marrying
