Hiro was on his way to visit his hospitalized best friend, Daigo. When he entered the room, he was shocked to find an unfamiliar beautiful woman sucking Daigo's cock and making him cum. Just as he was about to cry out in surprise, the woman whispered, "I'm his stepmom." Later, racing to make it before visiting hours ended, the two left for the hospital together. Desperate to get closer to her, Hiro convinces the woman to go with him to a hotel. There, her lewd, hidden side—beneath her role as a stepmother—is fully exposed. Word of her scandalous behavior quickly spreads among those around them...