Sho, a ronin student, receives a sudden phone call. The owner of the voice was Ran, a childhood friend of Sho's who used to live next door. She was also currently a ronin student and wanted to stay in the same room as Sho to take the winter course. When she met Ran again for the first time in a while, she still retained some of her old self, but at the time she was teasing her for having small breasts, but she had grown into an incredibly beautiful and big breasts. I was wearing a defenseless housecoat.