It's Not Love

From DMG:

"Let’s play a game. Who can make me fall in love?"

Kenji Oshiro, Yoshiaki Zaizen, and Akimi Shiratori are three young, successful professional men who have been close friends since college. But secrets will be revealed and emotions laid bare as their carefree friendship is disrupted by a mysterious young man named Kakeru, who proposes a dangerous game!