Miyashiro Saya struggled to connect with others throughout school and eventually dropped out entirely, finding herself without anywhere to belong. A job offer arrives through a former teacher's contact: a maid position at a wealthy household. The mansion is home to three sisters from the West, each carrying her own invisible weight. Working alongside them, Saya — who had sealed herself off from warmth for years — begins to rediscover what it feels like to smile. A quiet story of four girls, each carrying scars, shaping something genuine through the unexpected bond of master and servant.