Netamigokoro no Shiro to Kuro

Kazuki finds out his same-age supervisor Itsuki is talented in bed, too...

Not only is Itsuki great at his job, his appearance and personality are flawless, too. Meanwhile, Kazuki is exceedingly average, and he can't help secretly envying Itsuki. But, one day, Kazuki learns some compromising information about Itsuki when the two happen to meet on a men's dating app! Kazuki takes a flustered Itsuki to a hotel and seduces him, enjoying his newfound sense of superiority. At first, he'd only meant to tease, but now he can't get enough of his supervisor. Despite Kazuki's envy, their chemistry in bed is just too good! The dirty little secret they share only gets sweeter and sweeter...

(Source: Renta!)