~SPOILERS~
Well nothing says overpowered then being max level and not really caring(OPM) vibe and he trained hard to get there(so did OPM according to him) apparently the both lost something from this power boost, OPM lost his hair and emotions. But again there's only 10 chapter so we don't know what Lv999 has lost just yet. Worth the read as of now.
How can i write a longer review when it is only 10 chapters long and just extremely short. OMG this is not going tobe a good review with stupid limits on review lengths.
