Mistress life: as long as I am with you

Nami Kawasaki is the mistress of President Moriyama. Moriyama rented a high-end apartment for her and let her live a luxurious life. Unknowingly, the relationship between the two has lasted for two years. One day, Kawasaki received a call from his ex-boyfriend Yanase. It had been three years since the last time the two had contact. At that time, the company run by Yanase made a bad check and the work was in crisis, so the two broke up. Yanase came to Kawasaki's apartment, and the two started chatting, but Kawasaki had already seen through Yanase's purpose of coming to the door. He came for money...