Weird Things, I Use Physics to Solve Them

(Light novel + urban legend + imagination + two-dimensional + fictional + weird + single female protagonist) (This is a parallel time and space, it is all a imaginary structure, please do not take it seriously) Ye Lan feels like a high school student who traveled through time. There is a cute and arrogant sister whose parents are dead. There are obviously weird things in this world, but no one can see them... Obviously urban legends are true, but there are always people seeking death... Afterimages in an abandoned hospital, elevators leading to other worlds, four-corner games, water ghosts, little girls in red, etc... (New work by a newbie, please move to the main text)