A week of being invited by the shiny body of my stepmother who aspires to become a lingerie model...and drowning over and over again as instinct

After several years since we got married, my stepmother suddenly moved to Tokyo. When I heard about it, he was scouted by an underwear model and asked me to stay for a week. Naturally, his wife is completely opposed and ends up staying to calm her stepmother's mind. That night, when I looked into the room where the lights were lit, my stepmother couldn't give up, was wearing lingerie. I was captivated by the way my stepmother was something I normally wouldn't see. The next day, my stepmother, who had noticed me, approached me with a consultation...