Evan Hars woke up in the middle of the sorting ceremony at Hogwarts. With some knowledge of the Black Arts. And the guidance of a Black Arts AR system, what will he do in this exciting wizarding world? [This is the translation of 纯洁小天使's work]

I did not enjoy the original HP ending since I couldn't see how Hermione fell for Ron (I am fine with Ginny and Harry's relationship, but not a big fan). I saw a lot of potentials for Hermione and Harry to end up together. PS: English is not my first language, so I am prone to making grammar mistakes, and not write as elegantly as other better writers are able to.