Harry Potter: Most Annoying System Ever

Reborn as the sarcastic, black-haired twin of Draco Malfoy, Orion had a simple plan: ignore the pureblood politics, torment his father with logic, and push magic to its absolute breaking point. When a blue screen popped up on his eleventh birthday, he thought he’d hit the jackpot. A System? In a magical world? It was the ultimate cheat code. At least, until it spoke. Enter Sparkle: a sentient, sarcastic, and aggressively unhelpful "System" who refuses to give him quests, stats, or a manual. Instead, she demands he "live his life" and stumble blindly into obscure conditions to unlock rewards ranging from useless Gobstones to legendary Phoenix Tears. Now, Orion must navigate Hogwarts with a brother who has more hair gel than brain cells and a voice in his head that treats his life like a reality TV show. He doesn't want to be a hero; he just wants to figure out if setting a mountain troll on fire counts as an achievement. — Description from novelcodex.org