Nande Omae ga Ki ni Nannen!?

Overview

"But the guy I like should be that one!" Having moved to Tokyo from the countryside, the gay Azuma met Kyoutarou and fell in love at first sight! He's so happy to have met his type, but Azuma feels a hostile presence behind him. He turns around to see Miyako glaring at Azuma from behind his glasses. Apparently, he too has had a crush on Kyoutarou for many years... Azuma wants to get closer to Kyoutarou, but Miyako keeps annoyingly getting in the way. But, as the three of them spend time together, Miyako's bad first impression, that made Azuma think he was an "sneaky bastard," began to change little by little. (Source: East Press, translated)

Source: AniList