I found a mysterious notebook. It's a device that says if you write a date, time, and place in it, you can actually go back to "that place." Though I'm skeptical, I decide to go back to that day when I was just one step away from having sex, but I couldn't. That day when I was alone with a girl from the swim team in the locker room, but I got scared and couldn't finish, so I just ran away. That day when we were drinking at home and we were all sleeping together in a pile, and I couldn't make a move...