>>542360058
Money Making
The most accessible, but annoying method is obtaining the Gravestone Fragment (the promotion for pachinko) and save scumming for the pachinko jackpot. Even without the fragment, you still earn 50000 on the jackpot, but the fragment will double the jackpot.
If you're low on cash at night there are delinquents you can beat up nightly for a 2500 yen sell item, and each time you win the strip rock paper scissors game you'll earn your opponent's lewd underwear that can also be sold for 5000 yen, but the game will cost you 1 energy.
Once you have the max energy increase item from the DLC, the toughest jobs that cost 3 energy to do won't instantly send you to the next time period anymore, so getting that promotion to lead male pornstar early on might not be such a bad idea.
There are a few other random events that can earn you some decent cash, so be on the look out.