Family members, original heroine.
Stories about schooling at Hogwarts and experiences after graduation.
The plot strives to be true to the original work, including the provocative first encounter, the Screaming Shack murders, the attempted black magic attack, the mysterious breakup after O. W. Ls, the mysterious secret keeper, etc. (The style of painting is too Conan-like)
Although the heroine is a pure-blood, she is definitely not a Mary Sue. Her background is as follows. Her father is a pure-blood, and she can only be considered "still interested" in pure-blood ideas. My mother is 5 years older than her husband, and the Avery family is very supportive of pure-blood ideas.
The cp is tentatively named Sirius, but I don't rule out that there are others...
Those who may be hacked: Riddle, the Black family, Slytherin, the professor (I am a SS fan, but to write about The Godfather, it seems that the professor must be shot...). I strive for a fair description of the professor, but there were too many flaws during my student days.
A few supporting characters will be brought in from the original work.
There are minor spoilers below
(If this article can be written until I graduate from seventh grade, I would like to plan a new pit to write about the heroine's niece in the next generation, and the cp has not yet been determined...)
Okay, actually a slight spoiler is that the heroine has a niece. . .