She can't remember who she is, where she works, or who these dashing young men are that keep talking to her. Waking up in a hospital with no memories, our young heroine has found herself in an uncomfortable situation. A boy named Olion seems to be able to help her, but there's a catch – he's a spirit and only she can see him.
As she struggles to understand her reality without her condition being discovered, there are other oddities besides her forgotten memories. The constant repeat of April 1st (the day she keeps waking up in hospital), and the slight changes in her relationships between others might be the key to understanding her mysterious condition. But is she able to solve this puzzle or forever be caught in this loop.