Tsugou no Yoi Sexfriend?

We learned the story of a young man who tries to win the heart of the only girl, but without success. Over time, he realizes that suffering from unrequited love for one lady is not so exciting, especially when there are so many beautiful and attractive girlfriends around who don't mind his attention at all.

Caught up in these thoughts, the guy decides that his house is more like a harem.