Gal wa Pocchari ni Koi wo Suru

Fearing that she'll flunk with catastrophic grades, Chinatsu Aoyama is ordered by her teacher to study and learn from Keisuke Godai, a chubby male classmate.

She hasn't really talked much with him until that point, but surprisingly, she hits it off with him. In the middle of learning and studying together, they steadily become closer and closer; and finally, one day she makes a realization about her own feelings.

This is a lovey-dovey vanilla sex story about a cheerful gal and a chubby boy.

(Source: DMM)