Hi Everyone,

This manga is about this really confident, and idolized uke, and a timid seme. One day the uke found a book that the seme dropped about S & M, maliciously, the uke tried to blackmail the timid seme but it backfired on him. The seme was actually the sadist lol. Thankksss

Is it this one

1. Shigekiteki na Kankei
   Kaiya has become bored with his sex life lately, it's just the same things over and over again, even with his frequent change of partners. When he finds a book on S&M dropped by reserved coworker Makise, Kaiya finds the idea intriguing. Suddenly he can't stop thinking about making Makise his very own M.. from Thrilling relations?