I Have an Arbitrary Door

This is just a door, a door that connects people and the world, a door that connects people and people from other worlds. Pass through the door to witness and change every world. Pass through the door to save and restore as many tragedies as possible. At least make people happy and leave so-called good memories. The introduction is weak, test the waters and write. If you have any questions, please feel free to tell me what can be changed. I will try my best and what I can't do is helpless. Let's work together~ This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.