About

You were living a normal life as a college sophomore, but starting a few months ago, every time the 21st rolls around, you wake up the next morning having forgotten everything that happened that day! Since then, it's become your routine on the 22nd to check your phone to see where you were and what you were doing on the 21st... That's when you noticed something. Looking at the photos and messages left on your phone, it seems you meet the same person every single 21st. His name is Rei Kamitani. He's a senior at your university, but in your memory, you aren't even that close. After much agonizing, you decide to go and ask him directly...