The March 2016 issue of Ciao magazine (cover pictured), which will go on sale on February 3, has announced that shoujo romance manga 12-sai. will be receiving a TV anime adaptation.

The manga drawn by Nao Maita has been serialized since the September 2012 issue of the magazine. Shougakukan has published eight volumes of the manga. The series was previously adapted into an 8-episode OVA series in 2014, continuing with a second season in 2015.

OVA Cast
Hanabi Ayase: Ai Kakuma (Amagi Brilliant Park)
Yui Aoi: Nanami Haruno (The iDOLM@STER Cinderella Girls 2nd Season)
Yuuto Takao: Soma Saito (Zankyou no Terror)
Kazuma Hiyama: Yuuichi Iguchi (Bokura wa Minna Kawaisou)
Marin Ogura: Mayuki Makiguchi (Pokemon XY)
Kokoa Hamana: Sayuri Hara (Pretty Rhythm: Aurora Dream)
Ayumu Tsutsumi: Tetsuya Kakihara (Fairy Tail)
Inaba Mikami: Atsushi Tamaru (Tamako Market)

Source: Otakomu

12-sai.: Chicchana Mune no Tokimeki on MAL