Shiro was a complete mother's boy and went on to college within reach of his home. Furthermore, sexual interest only comes to my mother, Rie. Rie, who is ripe, really wants to have a sexual relationship with Shiro more than her husband who is in a sexless state. Today is a hot spring trip that I decided to go with Rie and Shiro. Rie was a little worried that she might be connected to Shiro on this trip ...