I was supposed to stay long-term at my wife's parents' house, but she got busy with work and I ended up returning ahead of her alone. Being alone with my mother-in-law, Kogiku, felt a bit awkward, yet I also looked forward to relaxing after such a long break. Kogiku welcomed me warmly upon my return and asked for help with household chores. During this time, I couldn't help but notice her voluptuous body, and an uncontrollable desire began to stir within me. That night, driven by the pleasure I'd imagined, I decided to spend the night with Kogiku.