I'll give the tool a try. As for the game itself, now that I have a little more experience with it...
It's basically Marionette Company, an old PSX game. They don't try to hide it at any point.
Screenshot from this game:
(hopefully it works, if it doesn't, just check that DL site for a picture of the main "robot")
Image from Marionette Company:
Even plays similarly - you have so much money, you find a robot in a box kinda discarded, you take it home and rebuild it, then you have to "upgrade" it both hardware-wise and "knowledge-wise." Only difference is this probably has more sex and sex with other non-PC-important robots.
As for how to play it, in case anyone runs their computer in Japanese region:
Weekly sort of setup. Two "times" for each day. Monday through Saturday, you start out at the subway. Going to the shopping district (option 1) takes up your morning and you can go to stores to buy hardware, software, or go to a cafe where you can flirt with the one hostess and have sex with her. Also, she shows you her arm for some reason. Don't read Japanese, maybe it's foreplay, maybe it's the secret of life. If you don't go on the subway, you go back home where you can train the robot (option 1), go to the lab (option 2), or go talk to some odd-looking guy (option 3.) Think this last option is needed at certain points to progress the storyline and upgrade further. At night, same options, except "visit creepy dude" is replaced with "go to bed early" I think.
When training her - I think every option except the last gives some progress towards increasing her level. Without knowing the language, I have no idea what they say. Last option I think ends it early and progresses time.
When in the lab - Option 1 is I guess a "status update." Overview of hardware, software, and level. Last thing is her level - it'll say KIZUNA-XX where XX is the level. You need to hit certain points to progress the story along with events - there's a text file in the game folder with event criteria. Option 2 is hardware / software upgrades. You select a body part (head, arm, chest, or legs) and if applicable, a "subcategory" of that part (for head, the CPU, OS, or two other things, etc.) Chest is different - the ribcage can be upgraded, as well as what I think is her power source (once you remove the ribcage.) Option 3, I have no idea what it does. Option 4 goes back to the previous screen and progresses time.
On Sundays, you go out with her. If you ride the subway, you can go shopping at one of the stores with her. If you don't go shopping, you can go back home and go to other specific places. I think Option 1 here on these days takes you to the subway, Option 2 is... the street, where you run into someone you can have sex with at some point? Option 3 is I think the odd guy's lab, which has two options itself there. Option 4 I believe is the hospital, where you can work for some money. You also get some money I think by completing milestones and progressing the story, at which point more shop upgrades become available.
That's all I've figured out so far. Some of the CG scenes are identical to the PSX version, only hand-drawn on a computer so it's not a total copy.