A year after marrying my wife Yuu, I started living with my father after my mother passed away. I was happy, but I had one problem. I had erectile dysfunction and couldn't get an erection. I wanted to have a child, so I tried a lot of things, but nothing worked. One day, I was worried about it, but when I saw my father massaging my wife, my crotch reacted. I'd never had anything like this before... So I asked my father and wife, "Can you show me how you two have sex?"