This is a silly story written by a student party author on a whim. The female protagonist Luoyi is the prototype of the author. The style of the full text is biased towards sand sculptures, CP Sirius. Because the author is a student, I do not guarantee updates, but it is definitely not a trap. The heroine takes her classmates through time, not a Mary Sue.
Idea: What if I accidentally travel to the world of Harry Potter one day? Waiting online, quite urgent.