Amid her demanding role as student council president, Mio maintains an enviable balance of academic success and athletic achievement while sharing lighthearted moments with her childhood friend, cousin, and admiring peers. At home, the steady presence of her live-in helper brings warmth and a sense of family, easing the quiet left by her parents’ overseas work. Together they form a close-knit circle that makes each day feel complete and rewarding. Then an unforeseen event intrudes, threatening to unravel the stability she has always taken for granted.