Time travel, but it is the author's own setting
Tinasha originally wanted to make an occasional guest appearance in the plot to provide warmth to Harry and serve as a support, but...
CP is an original character with a somewhat original name...
Protagonist Slytherin, male protagonist Ravenclaw, one-on-one
The heroine is a sjb, because the author himself is very neurotic... His views are positive!
But both the heroine and the hero are very inhumane to their opponents, thank you for the lightning protection.
Purpose: Lao Fu will be gone, and all members of the Order of the Phoenix will survive.