Lin Yuyu is an ordinary boarding high school student, living a seemingly ordinary and harmonious life, a seemingly simple and happy small family, her parents are healthy and loving, and her grades are average. Fortunately, her parents do not put too much pressure on her.
Not sure why, Lin Yuyu always felt that her things were always lost, and she felt that the classmates around her were very different. It was strange, like a memory disorder, which made her feel something was wrong. She discovered... The person in the mirror at home, this person looked exactly like Lin Yuyu. No, the mirror should look like a person, but this person wears different clothes than Lin Yuyu. Rather than saying that they are exactly the same, it is better to say that they are the same person. Is this? What's going on?
Concept: time machine, space-time machine