Mitsume Sugi ni mo Hodo de Aru

Yukiya gets sexually aroused when people watch him. He dances at a members-only show club.
One day, his ex-boyfriend from junior high school, Chika, comes to work at the club as a guard. Unlike the old days, he is surprised to see Chika, who has worked out and grown into a muscular man. He is happy to see him again and gently asks him to meet him again.
When Chika stares at him, he feels a rush of pleasure that he has never felt before, and he can’t resist. He kisses him forcibly, and he is melted by his kisses…!

(Source: Frontier Works, translated)