487 Luffy is Lost in The MHA world, but he gets taken in by Momo's dad » by Andreiuhs So, after defeating Kaido, Luffy stumbles upon a mysterious portal. turns out that portal is unstable and it makes Luffy go to the top of the UA building where he has an encounter with a... mink? and a middle aged business man. and by sheer luck Luffy now attends UA school, with his new friend Momo.