Love Is an Illusion! The Queen (2022)

Blurb:
It takes quite the stoic to resist the ambrosial pheromones of an Alpha. Do-gyeom’s used to getting sex partners within seconds, but finding a suitable marriage candidate seems to be more time-consuming. However, Do-gyeom isn’t worried. She has her secretary, Seung-ah, to rely on. Stone-faced and level-headed, he’s one of the only people who knows her inside and out. If anyone can help Do-gyeom put her days of debauchery behind her, it’s Seung-ah. But as it turns out, things aren’t always that straightforward …

Source: www.anisearch.com/manga/74728