Romantica Clock

Romantica Clock (ロマンチカ クロック, Romanchika Kurokku) is a Japanese manga series by Yōko Maki, serialized in Shueisha's shōjo manga magazine Ribon from August 2012 to June 2016, totaling up to ten tankōbon volumes. An anime television series adaptation aired from February 4 to February 25, 2014 as a segment on TV Tokyo's children's television series Oha Star.

Plot
Akane is a beautiful and popular girl who is lively and full of vitality. Aoi looks like a small animal but is actually very clever. Who knew that these two very different people were actually... twin siblings?!