Is there a walktrought of this game?
You need to equip keys in this game, though only once, to unlock each locked door.
1. Search the house, find money & stuff, tie yourself up, untie yourself, go to sleep.
2. Go to school, meet your friend Cher.
3. Go to the commercial district, get a job at the supermarket.
4. Get out, get kidnapped, free yourself, no, really free yourself, then go back to Cher's house (The rich mansion in the middle of the map)
5. Get involved in the hunt for who arranged the kidnapping.
6. Find out, or fail to find out, for different situations.
7. Go to the house of the author, in the south district, to find out a bit more.
I'm writing vaguely on purpose, the machine translation made it difficult to understand things in some cases, but I also don't want to give spoilers, it took about an hour and a half to finish the main content.
You can make 100g working at the supermarket, your daily expenses are 50g.
You can visit the park in the night to meet another bondage enthusiast girl, she'll give you a camera if you see her again. Haven't managed that yet, though save file #1 includes that (but has the worse end regarding the main quest, not that it's crucial)
Throughout this, you can find or buy items to tie yourself up with and deposit keys in public places so you'll have to get there at night without anyone noticing you to free yourself.