Tsubaki Hibino

Tsubaki Hibino is the main protagonist of Kyou, Koi wo Hajimemasu. She loves doing her little sister's hair but doesn't think the cute styles suit her at all. As a result, she braids her hair everyday and wears old-fashioned clothes and is often teased at school for this. Kyouta Tsubaki makes her his next "target", and she ends up falling in love with him.

Kyouta initially rejects her after her first confession, but he grows to accept her, and they begin dating officially in chapter 16.
(Source: Wikipedia)