Hommarang XX-hagi

Im Do-Gyu, main vocalist of the group Runners High. One day on his way to a music show, Do-Gyu spots a male fan calling out his name. Realizing romantic relationships (!!) are happening within the group, Do-Gyu feels resentful that he, being gay, can't even meet a single guy. Then, he runs into the male fan who called his name in private. In a fit of anger, they end up sleeping together...

Only to find out later, this guy? He's not even my fan?!

(Source: Ridibooks, translated)

Note: The third story in Mago Creative's Idol Danpyeonseon (아이돌 단편선) Collection.