8-Nengo no Tsuzuki-kun ga Amasugiro (Official)

Kotobuki has been asked to handle a meeting with her company's business partner. But their sales agent, who is extremely handsome by the way, turns out to be none other than Tsuzuki, Kotobuki's high school classmate from 8 years ago! Back then, everyone knew him as the heir to a large corporation, and he was incredibly popular, always surrounded by girls. By comparison, Kotobuki was modest and unassuming. She absolutely dreaded dealing with Tsuzuki, who would often pick on her. Though terrified at first, as Kotobuki continues working with Tsuzuki, she realizes that he's changed. Could this be the budding of an unexpected romance?

(Source: MangaPlaza)