Ah, I figured out and able to play normally...
Here's the instruction,
Note: as for virus in crack, lol.... don't download if you really paranoid
If the Windows Defender detect it as virus, set it "allow on device" after that just follow number 5
If the browser detect it as virus asking whether to "Keep" or "Discard". Click "Keep"
1. After downloading all the parts (part 1 to part 6)
2. Download either link crack given by @always_smile
3. Extract all the part 1 to 6
4. If there's duplicate, just click "Yes to all" (replace all since they are same name and sizes)
> Open "setup.exe" in slowdamage_master_DLsite folder to install Slow Damage game
> Just click next till installation complete (I assume you know the process of installation right? e.g. save the file to location, TnC and etc)
5. Extract the crack and replace the original (Or if you was download on different files, just copy/cut and paste to スロウ・ダメージDL版 folder)
> Then you can play game but in Japanese
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(Skip if you have Textractor downloaded)
6. As for Japanese text to be translated, download the Textractor.
https://github.com/Artikash/Textractor/releases
7. Choose "Textractor-5.0.0-Zip-Version-English-Only.zip"
8. Extract again :)
9. After extract, choose x86 folder
10. Open Textractor.exe
11. Don't feel so overwhelmed by a lot boxes appearing :D (my first time experiencing too)
12. Choose the Google Translate box
13. Choose droplist Translate from: >Japanese
14. "Rate limiter token count" and "Rate limiter token restore delay" >0
15. Open the game until the opening (Use google translate app camera if you totally can't read Japanese at all like me XDD)
16. Then return the Main Textractor window and click "Attach Game"
17. Select Slow Damage.exe
18. Thanks m@n@z@SHi for teaching how to hook (you can read the thread number #27:
http://www.anime-sharing.com/forum/...ジ-slow-damage-1057255/index4.html#post5757082)
19. Basically: Click Add Hook and paste "/HS65001#-1C@5C40:slowdamage.exe" (without quotation)
20. Just random click until you find the text that able to translate to English as shown in picture by m@n@z@SHi in thread #27 (page 4)
21. Then once you find it, click Save hook and Voila you can play it smoothly as much as you want!
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Tips: You saw the box with text: "Right click to change settings......bla bla bla" yeah go ahead and right click to adjust whatever you want, be it dark colour for background and text. Then return to game, click the dialogue, it should appear translation automatically. :D
Click the background colour and click "OK" to set the opacity to 0.5 or whatever you want.
Make sure check/click "Always on top" if you want it always on top when you clicking the dialogue in game lol....
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This reply indicate all the links and crack are still working without problem as for now.
Enjoy the game :D
(Tbh I still worry that did I missed the steps?)