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.
Unfortunately the series 12-sai.: Chicchana Mune no Tokimeki is not yet available on Disney Plus. Follow us on Facebook to see when 12-sai.: Chicchana Mune no Tokimeki becomes available on Disney Plus!
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Kiss, Dislike, Kiss | 2016-04-04 | 14 min |
| Season 1 | Episode 2 | Confession | 2016-04-11 | 14 min |
| Season 1 | Episode 3 | Double Date | 2016-04-18 | 14 min |
| Season 1 | Episode 4 | Triangle | 2016-04-25 | 14 min |
| Season 1 | Episode 5 | Birthday | 2016-05-02 | 14 min |
| Season 1 | Episode 6 | Boyfriend | 2016-05-09 | 14 min |
| Season 1 | Episode 7 | The Beginning | 2016-05-16 | 14 min |
| Season 1 | Episode 8 | Name | 2016-05-23 | 14 min |
| Season 1 | Episode 9 | Friends | 2016-05-30 | 14 min |
| Season 1 | Episode 10 | Orihime and Hikoboshi | 2016-06-06 | 14 min |
| Season 1 | Episode 11 | Summer Love | 2016-06-13 | 14 min |
| Season 1 | Episode 12 | Hanabi | 2016-06-20 | 14 min |
| Season 2 | Episode 1 | Love, Kiss, Kiss!? | 2016-10-03 | 24 min |
| Season 2 | Episode 2 | Rival | 2016-10-10 | 24 min |
| Season 2 | Episode 3 | Promise | 2016-10-17 | 24 min |
| Season 2 | Episode 4 | Heart | 2016-10-24 | 24 min |
| Season 2 | Episode 5 | After the Rain | 2016-10-31 | 24 min |
| Season 2 | Episode 6 | Balance | 2016-11-07 | 24 min |
| Season 2 | Episode 7 | One-sided Love | 2016-11-14 | 24 min |
| Season 2 | Episode 8 | Adults | 2016-11-21 | 24 min |
| Season 2 | Episode 9 | Self-interested | 2016-11-28 | 24 min |
| Season 2 | Episode 10 | Bye Bye | 2016-12-05 | 24 min |
| Season 2 | Episode 11 | Always | 2016-12-12 | 24 min |
| Season 2 | Episode 12 | I Love You | 2016-12-19 | 24 min |
| Sound | Takeshi Ike | Original Music Composer |
| Writing | Miyu Yuzuki | Lyricist |
| Sound | Machico | Theme Song Performance |
| Writing | Seiji Miura | Lyricist |
| Sound | Motoyoshi Iwasaki | Music Arranger |
| Visual Effects | Takeshi Ike | Compositing Artist |
| Sound | Takuya Watanabe | Music Arranger |
| Sound | Seiji Miura | Original Music Composer |
| Sound | Naoto Yamaya | Sound Effects |
| Visual Effects | Shouko Hagiwara | Character Designer |
| Art | Toshiko Kaizu | Art Designer |
| Production | Hiroyasu Oyama | Executive Producer |
| Production | Ryota Kanda | Producer |
| Art | Michiko Yoshida | Art Direction |
| Production | Masanori Yumiya | Executive Producer |
| Writing | Maita Nao | Original Series Creator |
| Sound | Hiroyoshi Oosumi | Music Producer |
| Production | Takemoto Mori | Executive Producer |
| Sound | Aoi Mizuki | Theme Song Performance |
| Sound | Kei Tomoe | Theme Song Performance |
| Sound | Yui Fukuo | Theme Song Performance |
| Directing | Masaharu Okuwaki | Series Director |
| Production | Kaori Itou | Producer |
| Directing | Kumiko Habara | Assistant Director |
| Sound | Yuuki Hirose | Theme Song Performance |
| Sound | Kentaro Anai | Music Producer |
| Production | Naohiko Furuchi | Producer |
| Sound | Risa Sakurana | Theme Song Performance |
| Art | Maita Nao | Original Series Design |
| Production | Makoto Hujou | Executive Producer |
| Production | Naoki Nakamura | Executive Producer |
| Production | Hiromasa Minami | Producer |
| Production | Reiko Sasaki | Producer |
| Sound | Saori Ogino | Theme Song Performance |
| Production | Masakazu Kubo | Executive Producer |
| Sound | Motoyoshi Iwasaki | Music |
| Editing | Mayumi Komori | Editor |
| Production | Satoru Nakano | Executive Producer |
| Production | Kentaro Anai | Producer |
| Sound | Kazuya Tanaka | Sound Director |
| Production | Toshiaki Okuno | Executive Producer |
| Camera | Yasuji Yamagoe | Director of Photography |
| Production | Rie Ukai | Producer |
