Garuru Girl

Mochizuki is reunited with his first love, Kawarashi, when he enters high school. Unlike the mischievous tomboy he used to know, Kawarashi has grown into a ladylike beauty, but their close relationship hasn't changed. But when school started, Mochizuki has trouble even approaching the popular Kawarashi, until an incident leads him to discover her "secret"...? An inter-species romantic comedy between an ordinary boy and a wolf girl!

(Source: Kadokawa, translated)