Soon Young is very forgetful. Sometimes he even forgets about his friends, it's not the first time. But, it's that's just a personality trait. Soon young started to forget himself; who he was or the person he loved so much, Jihoon. It got to the point he even forgot his name. Then, he was told he had a mental health problem, since his brain has been diagnosed to have something wrong with it, he forgets everything that happened the day before. And the thing Soon young seems to be unaware of is Jihoon. His heart was breaking slowly, seeing that Soonyoung can't remember him or their memories. The worst thing is, he can't do anything about it anymore. It's to late... Or is it?