Harry Potter: I Became the Strongest with a Game System

[Blurb One] After I shouted "Avada Kedavra" at the professor with an ugly face on the back of his head, practically cowering in fear, the Chosen One gave me a worried look as I was escorted to the Headmaster's Office "As a first-year student, where did you learn the Unforgivable Curses?" "Uh, don't they come free with the starter pack?" "Did you know all along that Voldemort's soul fragment was attached to him?" "No way, are there really people who haven't cleared the story of The Book of Names?" "How do you know so much about the layout of Azkaban?" "Damn! Are you telling me you've never been thrown into Azkaban for detention?" "Professor Snape was actually willing to vouch for you. Are you his illegitimate daughter?" "Come on, you're so clueless. Isn't it common knowledge that you can unlock the Echoes storyline by going to the Forbidden Forest?" "Wait, you went to the Forbidden Forest too?!" At last, Dumbledore nodded and put on his kindly smile again. "I understand. You are a 'Chosen One' who has transmigrated here from another time." No, I just played a game called Harry Potter: Magic Awakened. [Blurb Two] After maxing out the affection levels of every NPC in the game, the game System told me I'd unlocked a hidden achievement and rewarded me with an unlimited trip to Hogwarts. "Wait, aren't we already at Hogwarts?" "I mean the real Hogwarts." ? Keywords: One-sided crush, satisfying power fantasy, timeline mostly accurate but details are all over the place Premise: Fall in love and have fun