"I'll ask you for the last time.. will you marry me?"

In a world of advanced technology, a doctor named Ivy succeeded in her research on replicating desired body parts. disabilities and diseases no longer exist. If a person registers their DNA, desired body parts can be replicated—Naturally, there were both proponents and opponents, particularly regarding the duplication of the brain. Of course, Dr. Ivy openly stated in public that it was forbidden because it was an ethical issue.

Hint: Everything will be clear in that notebook.. If you're still confused it means she has succeeded. It's okay, don't mind the notebook just go on a date with her, then she will proposes to you later. And also don't go to her lab.

So, basically, the real you has died. You died in a car accident, and your girlfriend couldn't accept it, so she tried to clone and "fix" you by using your DNA and memories. Why don't you remember anything, and why do your parents act as if everything is normal? It's because she altered your parents' memories, too.