ミントチョコレート

Fujimaki Nanami, a high school girl with a crush on her classmate Suzumura Kyohei, faces a shock when her mother remarries, making Kyohei her new stepbrother. Living under the same roof, Nanami struggles with her growing feelings for the cool, aloof Kyohei, who hides his own emotions behind a sharp exterior. As they navigate their new family dynamic and the tension of their forbidden attraction, this sweet tale blends romance, humor, and the bittersweet challenges of love, following two teens caught between their hearts and their unexpected sibling bond. (Unreviewed summary by Grok 2)