Matching Reversal Maker

Negura works at an app development company and absolutely hates his boss, Tai.
Tai is effortlessly competent, good-looking, and always seems to overshadow him, fueling Negura’s inferiority complex. But the most irritating thing of all? Tai’s secret—he's a top-ranked top on a dating app exclusively for men.
Unable to stop himself from imagining what his insufferable boss is like at night, Negura spends his days in frustrated turmoil.
One day, after a work blunder leaves him seething, Negura finally snaps and pins Tai down. Seeing his usually composed boss flushed with shame and pleasure… he can’t hold back his excitement!

(Source: Fusion Product, translated)

Note: Includes one extra chapter.