This Passerby Role Is Too Conscientious

This is a modern magical world full of magic, monsters, powers and gods. Monsters are constantly emerging from the cracks in space, and gods from outside the world are eyeing it, wanting to devour civilization. There is a crisis lurking in human civilization, and the world is inevitably sliding into the abyss. Of course, these are minor issues. Shen Yunqin was a little confused. What should I do if I time travel into my own unfinished novel and become a passerby? Waiting online. Quite urgent! Why do all the heroines revolve around him, a passer-by?