My Body's Completely Corrupted - Ravished By My Boyfriend's BFF Iroha Natsume

Asuka, in her fourth year at the company, is engaged to Hayato, whom she has been dating since her student days. She is blessed with good colleagues and leads a busy but fulfilling life. Then, her close friend Miyuki, who is also a colleague, asks her to act as a go-between for her and Masaomi, who is in the same department as Asuka...