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Synopsis

Yuuta, the only male in his household, shares a particularly intimate bond with his older sisters Chiyo and Chinatsu. He develops romantic feelings for Chiyo, who responds with tenderness and indulges his adolescent fantasies through affectionate behavior and cosplay. Observing their closeness, Chinatsu becomes resentful and actively seeks Yuuta’s focus. As a headstrong tomboy with a domineering approach, she contrasts sharply with Chiyo and pursues him with assertive sexual behavior. These shifting dynamics disrupt their domestic routine and spill into their school existence, compelling the three siblings to navigate their changing relationships and negotiate a balance between competing desires and everyday responsibilities.