I don't know if it's just me but it usually takes 3-4 hours for a fresh playthrough and I know how to read the phone's guided list.No grind really if you get to the point where it’s not working for you use the phone
For a NEW player, it is a confusing mess trying to figure out how to unlock scenes or progress characters.
Using the phone incorrectly to change character stats can lock you out of scenes or break the triggering order.
Triggers for some scenes only happen on certain days or at certain times which requires a lot of menu navigation to keep changing the clock.
Even using the phone for teleporting, money, guides, and stats you still need to go through all the guides in order and chances are you will get stuck several times on your FIRST time playing the game.