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The ship between two emotional messed up, angsty, and loving teenage boys from the anime Seraph of the End. It's between Mikaela a vampire and Yūichirō a human/demon/angel and it is beautiful.
Mikayuu is so close to being canon it hurts.

Mikayuu will be the DEATH of me!
by YourOneGayFriend March 17, 2017
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Mikayuu is a pair whom will sacrifice everything for each other because of how strong their love is
Mikayuu is gay. Calls the police
by LanaMikayuuLover July 11, 2018
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