Kobeni Yonomori

Kobeni Yonomori is a seemingly ordinary yet quietly remarkable high school freshman whose life takes an unexpected turn on her sixteenth birthday — the day she discovers she has a childhood fiancé named Hakuya Mitsumine. From that moment on, she begins sharing a roof with both Hakuya and his younger sister Mashiro. A natural homemaker, Kobeni effortlessly manages every household task with grace and dedication, all while remaining blissfully unaware of her own charm and popularity. Her gentle spirit, however, carries a hidden vulnerability: a near-fatal accident in her early childhood was only survived thanks to Hakuya sharing his mysterious power with her, leaving her prone to sudden fevers and physical weakness whenever she faces intense stress or emotional shock.