An is a swimmer--who submerged himself with water because of stress--his parents are always fighting and An decided that he wouldn't love. Usami is a rich and popular kid in the school who does have lots of relationships but will end them as soon as the girl falls for him. Love is almost like a game for him because of the way he was brought up as a mistress's child. Usami then fell for An because of his coldness--which he finds rejections intriguing. An, also felll for Usami but was afraid--
uke is super popular but a virgin. He refuses to sleep with the girls he dates unless he falls in love. The Seme found out his secret about being a virgin and basically blackmailed him into dating him. He fell for the seme and started to want to sleep with the seme.
Konna Otoko wa Aisareru