Does it really need an explanation?

Kawaii~Chan is a girl in school who is known to her ability to make someone smile even in their gloomy days. That's where Zane Ro'meave come to their school, his brothers highly doubt that Zane would smile. Kawaii~Chan is up to the challenge to make him smile, causing her to hang with Zane way often. Will Kawaii~Chan make Zane smile?