is a Japanese slice of life romance shōjo manga series written and illustrated by Nao Maita.

[2] It began serialization in August 2012 in Shogakukan's Ciao manga magazine[3] and ended in October 2019.

When Hanabi is chosen to work with Yuuto Takao for an upcoming test, she begins to fall in love with him and they both start dating.

The ending theme is "12-Year-Old's Love" (恋の12歳, Koi no 12-Sai) by "Singing Cat's Song Company" (うたたねこ歌劇団, Utata Neko Uta Gekidan).

[38] In 2019, Age 12 won the 64th Shogakukan Manga Award for the children category.