Rino Tanaka

Rino Tanaka is the younger sister of the story's male lead, currently serving as the manager of her middle school volleyball club in her third year. Despite sharing a striking physical resemblance with her laid-back brother, her personality couldn't be more different—she is sharp, dependable, and exceptionally skilled at household tasks. Her affection for her brother borders on obsessive, which fuels a persistent rivalry and wariness toward Ota, who is rarely far from her brother's side. Notably, she shares a genuinely warm and close friendship with Ota's younger sister, Saya.