Risei wo Sutete, Doukei wo Idaku.

"Didn't I tell you? I hope we have a connection." Ayame is enjoying her life working hard and building her career. It can be hard sometimes, but her coworkers depend on her and the job is rewarding. One day, she hears that the president's son will be taking over while the president takes some time off. The news doesn't interest her much, as she is content as long as she can do her job. That night, Ayame meets an overly friendly, somewhat shallow, but attractive man named Tsubaki. Swept along by the atmosphere and alcohol, she ends up sleeping with him. Ayame tells herself that what happened was a mistake and that she can't become serious about him, but her heart yearns for Tsubaki...! (Source: MangaPlaza)