Kiss dake de Kekkou desu.

Mashiro is a college student who loves kissing. Convinced that kissing is better than deeper physical interaction, he's after the ideal kiss but has yet to meet the lips of his dreams.

One day, Toru, a fellow student who's very popular with girls, comes to Mashiro asking him to be coached on kissing. He's insecure due to a girl once laughing at him about how bad he was at it. It's Mashiro's first time kissing a guy, but he can't get enough of Toru's lips, so coaching him is actually quite fun. However, Toru asks if they can touch each other's bodies while kissing and that turns out to feel absolutely incredible! But then, Mashiro starts to feel self-conscious in front of Toru...

(Source: Renta!)