Love Your Love Enemy summary:

“I hate him, but I want this face all to myself!” Yousuke and Daichi, students at the same university, are romantic rivals for Mitsuru. However, as a result of a stratagem of Mitsuru’s, they get locked in a room and can’t leave until they have sex! The two love rivals. Yosuke kisses Daichi in an attempt to tease him, but to his surprise, Daichi has such a sexy reaction…!?