Reiko's Ramblings and Writings
The goal seems to be to make enough money to buy an open ticket on the shinkansen, which can be accomplished a number of ways. By the end, the reason almost doesn’t matter, but there’s a bit of exposition at the beginning about the PC running away from her family and her father’s hired goons. The process of acquiring the money mainly involves taking multiple short-term jobs in the area, some not so legal, and solving puzzles to complete those jobs.