The stepchild from the remarriage is a hikikomori. They have an awkward relationship where conversation barely happens. One day, while Mariko was dozing off, her stepson peeked into her crotch and started to remove her panties. Mariko noticed midway and confronted him, but he said he just wanted his mother's warmth. From that day on, it seemed like a new relationship between mother and son would start, but the son had been seeing his mother as a woman.
