Amayakashite Ageru - Fukushachou to Naisho no Doukyo Seikatsu!?

How did this happen?" Nanami, a regular employee, ended up somehow catching the eye of the hot vice president of her company. Yuuma was the incredible vice president and son of the president, so there was no way they would normally interact, but he suddenly ended up living in Nanami's apartment! She had always admired him, but didn't let herself get excited. After all, she was nothing more than his roommate. Despite that belief, he confessed his love and desire for her, and Nanami gave him her virginity. He taught her just how pleasurable things could be. Their sweet, rich days were kept a secret from the people around them, but one day, everything fell apart. A woman appeared before Nanami, claiming to be Yuuma's fiancée...