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

Two years after Rin Tachibana, a romance-challenged woman in her thirties, 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?