Walkthrough and Start advice
This game is better than its score. Yes, there is a ton of grinding (some of it avoidable), but the story is engaging
and many of the characters are a pleasure to interact with. Warning: it's a female-dominated world, and the MC engages
in a number of 'hate' fucks and non-consensual acts.
Many complaints center around the size of the downloads; just search for the compressed version. There are also complaints about the grind, or about becoming stuck in one of the plot-lines and unable to advance the story.
Here's some help with both of those problems.
You don't need the official walkthrough. It contains the exam answers (which you can find elsewhere), but there's a better guide / walkthrough by Sube120 in post #795. Even then, you need to know that some of the plotlines overlap (you have to finish part of one to advance another), and some of them have stat pre-requisites (as in, you must raise your intelligence to 15 to continue this story line - but if your intelligence is already over 15, you're screwed). Yes, poor design, but there it is.
START
Some players recommend choosing the Hunter Class. Don't. Punch Power is easy to get, and 80 points is nothing. We're not going to need money, either. Choose 'Fornicator' for the stamina.
When you get to the character creation screen, you will see that you have 100 points to spend.
Cheat. Open the console ('Shift' + 'O' - the letter, not the number). Type in 'statslimit = 600. Return, and ESC. You now have 600 points to spend.
Keep your intelligence below 15 (if it's too high, it blocks a plotline; it's also easy to grind later).
Put your points into Charisma (I gave it 99, but didn't need so much), and stamina and natural power (those two stats are expensive and time-consuming to grind). You can also toss points into Punch Power (see why we don't need to be a Hunter?)
PLOT LINES
There are 7 of them
MAIN STORY
VIGILANTE ROUTE
UNIVERSITY ROUTE
ADENTE ROUTE
PARADISE ROUTE
DIA ROUTE
MAISON ROUTE
There are also smaller, subsidiary routes, mainly so that you can have sex with a variety of minor characters. SUBE120's walkthrough covers these.
Your goals:
Pass the Freedom Exam, so that you can free roam and access more of the story. Do not study or grind; just follow the University route and look up the answers.
You need to acquire money (you will need lots of it). Never mind working; just open the console and type 'Cash = xxxxxx'. You can do this whenever you need to.
Improving your stats is important, but there's no need to max them all out early.
The real trick here is starting several story lines early, and following them all gradually, rather than rushing to finish them all. Leave the Main Story alone, for now. Concentrate on University, Adente, and Paradise. I would also recommend starting Maison early, too (that's the one that limits your INT). Vigilante can wait until you're bumped up your punch power. This actually works out, because Paradise requires you to act at night, while Maison can only advance on weekends. During the weekdays, you can go to the gym in the morning and lift weights 4 times, then go to the University and study Varnese ( a language you will need later).
Do not attempt to fight too early; you want very high punch power to make short work of the baddies, and you probably want at least 2,000 for the later boss fights. Mia is in the gym in the afternoon, you can learn fighting styles from her.
If you stocked up on charisma, stamina and power at the start, you only need to grind punch power (the most tedious), Varnese, and INT (at the Hero Tower) - all free, all easy. Just to be safe, I spent a ton of money so that I could increase my stamina and power for the late game (from Alice, in the toilets at the University).
I finished all of the stories except Maison. Hopefully you can avoid whatever mistake I made.