I just started the game can anybody give me a walkthrough of the entire game?
This game has weird progression and no step by step guide has been made yet. Most scenes are connected to the scenes of other characters and those scenes can be connected to other scenes as well. Most important is to not skip dialog and to save often.
2 ways to tackle this, you either play through the game normally and slowly grind out points across many hours of interacting with different characters at specific in-game times/days OR you can use the phone to cheat with infinite money, teleports, time changing, and character progress points.
The quickest way to get everything unlocked is to get a notepad and go through each character's scenes while writing down requirements and then use the phone to cheat in enough points for each new progress step then play through that step and keep going until you unlock all the scenes.
When you get stuck on a scene or character, use the search feature in the top right of this forum thread to find answers.