that kind of made me realize we do technically have "oi" usage in english in the same way it's used in japanese, but with the caveat that it's british english... oi bruv innit
isn't his new job a little too much of a downgrade? as someone who's been doing revolutionary industrial research, for him to suddenly go and play around on the battlefield is a little...
nothing ever happens the manga
but like seriously though, don't we have at least like ten or so loose ends to tie up? what's going on with the tsundere girl with the scary face? the dad? nothing? absolutely no character development?