>>542388559
I'm not joking. I have yet to play P5/R (I will get through it some day, who knows) but everyone I have talked to had their playthrough of the original finish around 120 hours if they played to aim for all Social Links and 60 if they played at a fast pace.
60 hours is the amount of time it takes you to play Raidou at a slow pace with no NG+. P5/R is unironically one of the longest and most bloated JRPGs of all time.