私の正しいお兄ちゃん

Kizaki Rize, a college student working part-time at a supermarket, meets her coworker Umenai Kairi, whose gentle demeanor reminds her of the older brother she lost contact with after their parents’ divorce. As Rize grows closer to Kairi, lending him her shoulder to sleep on due to his insomnia, she stumbles upon his dark secret: a diary confessing he killed someone. Torn between her affection and the shocking truth, this intense tale blends romance, suspense, and emotional turmoil, following a girl’s journey through love, betrayal, and the search for her “true” brother amidst a web of hidden pasts. (Unreviewed summary by Grok 2)