Isekai Gohoushi Kiroku

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?

(Source: Seven Seas Entertainment)