After Being Abandoned, He Transforms into an Overpowered Badass To Seek Revenge From Everyone

Upon the arrival of a mystery Virus that kills everyone over the age of 13, hitherto undiscovered, power-hungry vampires emerge to conquer society in exchange for blood donations with the promise of safeguarding the survivors. Two young boys are kidnapped from an orphanage. Mikaela devises a rebellious escape scheme that is ultimately doomed to failure because she is unhappy with how the vampires treat her as though she is merely farm animals. Yuuichirou is the sole survivor who makes it to the other side and is discovered by the Moon Demon Company, A Overpowered military squad tasked with eradicating vampires in Japan. Anime - Ow@ri N0 $ERAPH