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12-sai.: Chiccha na Mune no Tokimeki

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12歳。~ちっちゃなムネのトキメキ~

Hanabi Ayase is a 12-year-old girl navigating the confusing space between childhood and adolescence. She generally dislikes boys due to the immaturity of her classmates, but her perspective begins to shift after she is partnered with the kind and gentle Takao Yuuto for a school project.

Their unexpected first kiss on the school rooftop sets Hanabi on a path of new emotions and self-discovery. Meanwhile, her best friend Aoi Yui, inspired by Hanabi's experience, finds herself developing feelings for the protective Kazuma Hiyama after he stands up for her. The series follows these four classmates as they experience the innocent worries, heart-fluttering excitement, and complex social dynamics of first love.

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