At Your Service in Another World (Manga) Vol. 1 -

A steamy tale about lust and disdain as one woman finds herself drawn to a knight she can't stand--based off the light novel! \nTwo years after Rin Tachibana, a romance-challenged woman approaching thirty, was unexpectedly whisked away to another world, she has settled into a quiet life as a clerk for the Magic Knights. But when the king secretly orders her to service her arrogant colleague Oscar Garland--a notorious misogynist--her peaceful routine goes off the rails! Yet, watching the proud knight unravel under her touch sparks a surprising thrill. Now, Rin must juggle her day job with her after-hours activities, all while keeping her late-night duties a secret. But can she really keep her cool working alongside him by day while bringing him to his knees at night?\n