18+ Sex Friend

Shougo, a man who's fast, accurate, and talented at work, and Leo, a popular radio DJ. The two have a fuck-buddy relationship that skips all the annoying stuff. They're only supposed to be interested in each other's bodies, but, bit by bit, their hearts grow closer!? A mix-up love comedy about two people who cannot say they love each other.

(Source: Shounen Gahousha, translated)