Love is the number of keys 愛は鍵の数だけ

Jun Amanuma is on his own for the first time. His father transferred overseas for his job, so he moves into an apartment as the apartment manager. One day, he witnesses his tenant having hot sex. The apartment owner tells him that this is a sex service apartment complex! Every night all the rooms in the apartments come alive with lustful action! Jun joins in on the fun! Watch his torrid escapades with Sumire, the owner, Marina, the waitress, Miki, the nurse, and more sexy beauties!