A side note on Succubus Affection. You can translate the game into English yourself!
It is done by dropping a hook into the Unity engine and running an auto translation plugin with it.
Here's how:
Prerequisites: Succubus Affection installed
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Step 1: The Unity Hook
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Go to this github page and download "BepInEx" v5.0:
You must be registered to see the links
The file name should be "BepInEx_x64_5.0.0.0.zip".
Paste the contents directly into the game's root directory.
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Step 2: The Translator
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Once again, visit this github page and download another file:
You must be registered to see the links
! MAKE SURE YOU ARE DOWNLOADING THE RIGHT ONE !
The correct one is by this name: "XUnity.AutoTranslator-BepIn-5x-4.7.0.zip"
Directly paste it into your game directory, adding to the BepInEx folder.
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Step 3: Test!
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Launch your game. The hook and mod you just installed translates any foreign text it comes across into English online.
If it's still not English, you may have installed the wrong files.
You will notice a lot of it will be poorly worded at first. You can fix that!
Navigate to: "SA (root)\BepInEx\Translation\en\Text\" and you can modify "_AutoGeneratedTranslations.txt" and your changes will automatically display in-game.