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Isekai rule
(lemmy.world)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
The Misfit Of Demon King Academy: History's Strongest Demon King Reincarnates and Goes To School With His Descendants.
Googled it and this one is real in case anyone is wondering
And there are people like "this is the single best manga I've ever read"