Chikkoi! Sora-chan to Kou-kun no 20 cm Sa no Koi(2012)

Chikkoi! Sora-chan to Kou-kun no 20 cm Sa no Koi

The 170cm tall Sora has fallen in love with the shortest boy in her grade, Hikaru. He's 150cm tall... meaning there's a 20cm height difference!!! But that obstacle doesn't matter! Sora tries hard to impress him by wearing a new miniskirt and becoming the manager of the basketball club he belongs to, but it's no use for the super insensitive Hikaru...! 20cm is a bigger hurdle than she could have imagined! How can she get Hikaru to notice her?!

(Source: Ciao Plus, translated)