Ryota brought home his senior colleague, Yukino, whom he had become close with at work. Seeing her son, who had never brought friends home before, open up to Yukino made Saeka, Ryota's mother, feel relieved, but... One day, after some time had passed, Yukino appeared while Ryota was out and said something shocking to Saeka: "Auntie… you must be lonely, right?" Saeka was shaken by the realization that her loneliness, which she had been trying to soothe herself due to her husband's frequent absences, had been noticed. However, her body, filled with unmet desires, could not resist Yukino's youthful and robust lust, and she ended up surrendering to her instincts.
