Kei Misumi

Kei Misumi serves as the school nurse at Hoshikaze High School, bringing a distinctly mature and captivating presence to the story. A striking contrast to her composed and rule-abiding younger sister Rin, Kei lives life on her own terms—bold, uninhibited, and always ready to fluster the male protagonist or her sister with provocative outfits and cheeky remarks. Beneath her carefree and seemingly shameless exterior, however, lies a genuinely warm-hearted older sister who deeply cherishes Rin, making her a memorable and multifaceted support character.