Donzoko kara no Gyaku Harem: Men's Cosmetic Kikakubu ni Idou desu ka!?

Yuzu is a simple and unobtrusive main character. She works hard, has a boyfriend, and is living a good life. That is until one day, when relaxing in her boyfriend's room as usual, a female colleague of hers barges in and proceeds to both accuse Yuzu of cheating and kick her out of the room. When Yuzu arrives at work, rumors circulate that she was the one sleeping around, and her reputation plummets. Shortly after, she is told that she will be transferred to another department. The department just so happens to be the men's cosmetics planning department, which houses all of the company's good-looking men. There's the handsome company prince, Ren. Akira, the beautiful. Kazuki, the good-looking playboy. The acts-uninterested-but-really-cares handsome guy, Sekai. Tatsumi, the quiet good-looking guy. Chiharu, the narcissistic handsome guy. And Sogo, the unrefined boss who organizes this group of handsome lads. Having heard the rumors, the guys start out with the worst possible impression of Yuzu. This is a story about a girl whose life is turned upside down as she clumsily works hard at her love life and position at a cosmetics company! (Source: MangaPlaza)