Nekura to Gal-O

Hana-kun is a tall, gloomy guy and Tomo-chan is a laid-back gal. The two of them grew apart when Hana-kun transferred to a new school, but meet again in high school...!? A slightly romantic coming-of-age story about two mismatched high school students who slowly come to terms with their own feelings and with each other!

(Source: Kadokawa, translated)