Have you ever regretted anything? There is such a door that allows you to travel to any time period you want. You can change your past and change the things you regret. This door is called the door of rebirth, or the door of time travel. There are too many things that I regret, and there are too many things that I want to change. Even if I have this door, can the ending really be as I wish? Anyone who plays with time must pay the same price. As for what the price is, you can only ask the person involved...
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