Rui Tachibana

Rui Tachibana stands as the central heroine of the story, embarking on a cohabitation journey with Natsuki as his step-sister. Her initial impression is one of emotional distance—marked by a near-expressionless face and difficulty connecting with others—yet as she pursues her dream of becoming a chef and deepens her bond with Natsuki, the fierce warmth concealed beneath her reserved demeanor gradually comes to light. The forbidden triangle she forms alongside her older sister Hina and Natsuki adds compelling tension to the narrative, while her remarkably decisive nature keeps the emotional stakes high throughout.