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The story begins with Hanabi, a sixth-grade girl who is neither an adult nor a child. She deals with issues such as accidentally witnessing her homeroom teacher kissing, and worrying about experiencing physiological changes before her friends. The series depicts a 12-year-old girl's innocent worries and first love.

Series Cast

  1. Sayuri Hara as Marin Ogura and Cocoa Hamana

    Sayuri Hara

    Marin Ogura, Cocoa Hamana

    36 Episodes

  2. Ai Kakuma as Hanabi Ayase

    Ai Kakuma

    Hanabi Ayase

    24 Episodes

  3. Juri Kimura as Yui Aoi

    Juri Kimura

    Yui Aoi

    24 Episodes

  4. Shun Horie as Kazuma Hiyama

    Shun Horie

    Kazuma Hiyama

    24 Episodes

  5. Tetsuya Kakihara as Ayumu Tsutsumu

    Tetsuya Kakihara

    Ayumu Tsutsumu

    24 Episodes

  6. Taishi Murata as Tomoya

    Taishi Murata


    24 Episodes

  7. Soma Saito as Yuuto Takao

    Soma Saito

    Yuuto Takao

    24 Episodes

  8. Shinnosuke Tachibana as Inaba Mikami

    Shinnosuke Tachibana

    Inaba Mikami

    12 Episodes

  9. Takumi Watanabe as Eikou

    Takumi Watanabe


    12 Episodes

  10. View More

Full Cast & Crew

Last Season

Season 2

2016 • 12 Episodes

Continue follow story season 1 Opening Theme "Ano ne, Kimi dake ni" by AOP (Member: Kei Tomoe, Yuuki Hirose, Saori Ogino, Risa Sakurana, Yui Fukuo and Aoi Mizuki). Ending Theem "Yuuki no Tsubasa" by Machico.

I Love You

(2x12, December 18, 2016) Season Finale

View All Seasons

12-sai.: Chicchana Mune no Tokimeki
12-sai.: Chicchana Mune no Tokimeki


Original Name 12歳。~ちっちゃなムネのトキメキ~

Status Ended


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Type Scripted

Original Language Japanese


Content Score 


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