Tonari no Mihoko-san ~Boku no Hitozuma Haramase Seikatsu~

Shota was a motherless young boy.
He yearned for the neighbor's wife, a beautiful woman named Mihoko.

It was fantasy from afar until one day it rained.
He had forgotten his key inside and was locked out.
Just then, Mihoko came to his rescue.

She dried him in her bedroom. That was where it began.

[From DLSite English]