Kore wa Tada no Shokuji dakara!

In a world where succubi and humans coexist in modern society, Maya finds getting the cum she needs to survive a hassle. One day, an introvert she goes to class with confesses his feelings for her. She normally wouldn't be interested in a loser, like him, but she decides she might be able to use him to cut out the annoyance of finding some random guy to fuck. However, this introvert may just end up being the perfect match for her...

(Source: Irodori Comics)