Danganronpa V1: Multi-Fandom Crossover

NOTES (skip to dashed line for description):
Includes:
Assassination Classroom
Hunter X Hunter
Durarara!!
Spy X Family
The Pet Girl of Sakurasou
Classroom of the Elite
Seraph of the End
My Hero Academia
Sword Art Online
(Yes, I realize this is ridiculous. Bare with me.)
(Author's note gives more detail | not spoilers)

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Michaela Hyakuya has been through it-he was abandoned by his parents, kidnapped by vampires, used as a food source, watched all but one of his siblings be murdered as he bled out, was kissed by a grown woman as he was dying without his consent at the age of ten, was turned into a vampire, went through grueling training, helped kill all the vampires, and searched for and reunited with his last brother from the orphanage all by the age of 15. Despite his troubles, he's managed to have an optimistic attitude about his life going forward, and he enjoys doing a variety of selfless and often charitable work for people, especially children - in need. All of this awarded him an eager acceptance letter from Hope's Peak Academy, along with the title: The Ultimate Survivor.

His adoptive brother, Yuichiro Hyakuya, who has spent the last five years making poor grades and sucking at iaijutsu, somehow gets in too.