I Just Fused with Doraemon, and Now I'm Escaping Hogwarts?

[Harry Potter + Doraemon + Subverting Expectations] To earn generous rewards in the main world, Qiu Chen travels constantly between various fan-fiction worlds, completing all kinds of missions. This time, he has arrived in the world of Hogwarts, where he plays a Chinese exchange student. The good news is that Qiu Chen has integrated Doraemon's trading System into himself. All he has to do is spend the emotions he earns from characters to pull all kinds of bizarre gadgets out of his pocket. There's the Nimbus 10086, a magic shovel, a brick of truth, a reversing hoe, a high-pressure cauldron... you name it. The bad news, however, is that the System's mission for him this time is [Get expelled from Hogwarts in the most flawless way possible]! Qiu Chen is stunned... "Get expelled from Hogwarts? And do it flawlessly?!" But soon, Qiu Chen is grinning again... "Being a good student is hard. Being a bad student should be a piece of cake!" Three years later. Dumbledore: "Let us give another warm welcome to this year's outstanding student representative, Qiu Chen! Come up and give a speech!" Qiu Chen is in tears... "It's a misunderstanding! This is all a misunderstanding!!!"