Description:

Working at the same company, the cool salesman Hazuki and project coordinator Mina are in the midst of a secret love affair. Due to the company's strict policy against office romance, if they are caught they will be forced apart. Even so, Hazuki has a sadistic side that knows no bounds and loves to cause mischief. Mischief that involves intense inter-office relations... (Source: Renta!)

Alternative Titles:

気持ちよくて声も出ない？ ～ナイショの社内恋愛、発覚!? 編～, Kimochi Yokute Koe mo Denai? - Naisho no Shanai Renai, Hakkaku!? Hen, Kimochi Yokute Koe mo Denai? - Ura Kareshi no Zeitaku na Shitsukekata, 気持ちよくて声も出ない？ ～裏カレシの贅沢な躾け方～