The father-in-law, with his bad drinking habits, had been living alone for a long time. To take care of him, Mako and her husband decided to live together. If he didn't drink, the father-in-law was a kind person. Mako and her husband had been abstinent lately, and even when she tried to seduce him, he refused due to exhaustion. One day, Mako and the father-in-law were drinking together and both got drunk. As Mako stood up, she almost fell, but the father-in-law caught her. Pretending to be concerned, he undressed Mako and had sex with her in her drunken state. The next day, Mako regretfully asked the father-in-law about it, but he had no memory of it. "I've never had sex like that before..."