[Reborn! + Harry Potter] Destruction and Return

Literary version: The Tenth Vongola Boss died after his Guardians betrayed him. Tsunayoshi Sawada, who became Salazar Slytherin, died because his companions betrayed him. Two betrayals, two cycles of rebirth. Reborn as a shadow, he will return in force, bringing destruction with him. What will he do to those who betrayed him before? Destroy them? Or... Concise version: A (not really) mute bookworm boy's (not really) cheerful life in the worlds of Katekyo Hitman Reborn! and Harry Potter~ Detailed (?) version: Suppose an eleven-year-old Japanese boy, while traveling in Britain, receives an admission letter from Hogwarts School of Witchcraft and Wizardry... Suppose this Japanese boy accepts and goes to school... Suppose this Japanese boy's surname is Sawada... Suppose Hogwarts holidays coincide with the Japanese school term... Suppose Hogwarts term time coincides with Japanese school holidays... Suppose the boy meets the Chosen One at Hogwarts... Suppose the boy meets Voldemort, who teaches Defense Against the Dark Arts at Hogwarts... Suppose the boy meets the legendary Big Three at Hogwarts... Would that turn everything in Katekyo Hitman Reborn! and Harry Potter upside down? Could Dumbledore's plan to raise the Chosen One go smoothly? Could the Tenth Vongola Boss complete his succession? Please note: I solemnly declare that no matter what, this story will have a happy ending. Also, I'm aiming for a serious, proper story with a light, funny tone, so dark, tragic writing styles, please stay away~ P.S. The pairing is set. I've recently become obsessed with GS, so it's GS, and it's not switching~ P.P.S. I'm not too fond of Dumbledore, and I don't like Gryffindor's recklessness. I can't promise not to portray them negatively. I like Voldemort and the Professor, and they won't just be there to make up the numbers. P.P.P.S. Please note that the characters may be out of character. If you don't like Voldemort or the Professor, please go elsewhere. If you don't like negative portrayals of Dumbledore or Gryffindor, please go elsewhere. P.P.P.P.S. This is my first Harry Potter story, and I'm ashamed to say I haven't dared to read Book 7... Well, lots of people say it's tragic... So please be understanding! Announcement: Writer's block is awful. I hate writer's block the most, damn it!! Here are the resentful words of Xiao Luo, who has fallen completely into the depths of writer's block... I suddenly thought of this while zoning out in a boring class: the plans for the Harry Potter arc really aren't working for me... Well, at least I'm not happy with them now. So I'm definitely going to revise the whole thing... Ahem, not completely turn it upside down the way you think~ I plan to finish the third-year Harry Potter arc in one go... Gah, the parts of this story that inspire me most are Shadow's past and, of course, the Future Arc! So, for the sake of the Future Arc, I plan to finish the third-year arc in one go, then move straight into the Future Arc after finishing the Ring Arc! Yes, yes! Here's a little spoiler~ The Future Arc will take place in the same time and place as Shadow's first life! I plan to tie up everything at once in the Future Arc (though I don't know if I'll manage it...)! The truth behind the betrayal, destruction, Merlin, [Blood Abyss], [Uncharted Realm], Dax, the Slytherin family, Byakuran, the third betrayal... Everything will be revealed in the Future Arc! (Though I'm saying this quietly, if it's not all resolved there, I'll wrap it up in the Harry Potter arc! ...gets smacked away) Notice: Because of revisions, some updates may only appear to be new, while others may add new chapters. I also want to explain that the Katekyo Hitman Reborn! Ring Arc will be on hiatus until I finish the third-year arc. After all, I want to finish the third-year arc first, then revise the Ring Arc, and then jump straight into the climactic Future Arc. Sorry for any inconvenience. Also: Because of revisions, merged chapters will sometimes contain [New Chapter Added]. To make sure nobody misses them, I'll post updates from time to time. The old story has far too many plot holes. As I revise the old chapters while merging them, I'll also make suitable additions. Once all the chapters have been merged, I'll update the second half of the third-year arc. New chapters: Chapter Thirty-Four (merged and revised): [--Big Brother] (A conversation between Voldemort and Shadow.) Chapter Thirty-Five (merged and revised): [Divination] and [Uncharted Realm] (Events in Divination and Care of Magical Creatures.) Chapter Thirty-Six (revised with a new chapter added): [It's All Me] (Major GS developments!) [Tsunayoshi Appears] (Warning! This chapter has been heavily revised and is completely different from the original!) [The Relationship] (Ahem, I made Salazar cry in this chapter.) Chapter Thirty-Seven (more chapters being added): [You Know] Time for recommendations~ New story (started entirely out of frustration...): Here's my profile. Please follow me and give me some support~ The cover was made by Qing Xian~ Thanks for the lovely cover~