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 in order to take a 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 incredibly beautiful and big breasts. I was wearing a defenseless housecoat.