How to Shove a Gag into a Lying Omega

Narumiya is an Alpha and a top performer at a trading company, hates his rival Tsukishima, and is passionate on not losing against him. One night, he saw Tsukushima whom he thought was an Alpha in heat?! A Secret Office Love of an Elite Salaryman (alpha x) and a beautiful and capable Omega that is hiding a secret♪