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Synopsis

After observing Natsuki and Yuu practice a confession, younger siblings Hina and Kotarou confront their own emerging emotions. Hina, whose initial middle school encounter with upperclassman Koyuki left a poor impression, finds herself drawn to him nonetheless by his gentle smile and warmth. Uncertain at first, she gradually recognizes these feelings as her first experience of falling in love. Determined to be near both her brother Yuu and Koyuki, Hina enrolls at Sakuragaoka High School, where romantic ties begin to interweave among her circle. Energetic yet emotionally open, Hina aims to convey her affection to the kind-hearted Koyuki. Kotarou, focused on keeping Hina happy and unaware of his own deeper feelings, remains a steady presence. The story traces Hina, Kotarou, and Koyuki through their high school days as budding romantic bonds create new connections and strain existing ones.