Tie Me Down and Open Me Up

The ladies love Rihito, but his secret obsession keeps ruining his relationships. His younger co-worker, Tomoki, is in love with him despite his quirks. He keeps asking Rihito to give him a chance, but the man just laughs and says he isn't into men. One night, Rihito's curiosity gets the better of him while they're drinking at his place, and he takes advantage of Tomoki's feelings to get the younger man to tie him up... The exploration and romance between a businessman and his easily manipulated co-worker just escalates from there!

(Source: Renta!)