Getting G Taste 6 Hiroki Yagami Working on Your Setup
I picked up G Taste 6 Hiroki Yagami a while back after seeing it come up in a few threads. It's a mod that replaces character models in Lost Judgment, specifically swapping in a Hiroki Yagami outfit for certain NPC models. The idea behind it was to make uniformed characters look different during specific scenes. It's not a massive overhaul, just targeted model swaps. You need Lost Judgment installed, preferably on PC through Steam or GOG. The base game should be fully updated. Then you need reShade installed with the MetalHawk preset, because this mod uses SH4EFakerR3.dll to hook into the game's rendering pipeline. Without that DLL in your game folder, nothing will load. I learned that one the hard way after spending two hours wondering why my game kept crashing to desktop. You will also need WinRAR or 7-Zip to extract the archive properly. The files inside are organized into an "Original" folder for backup, a "DX12" folder, and a readme. The folder structure matters. Don't just dump everything into the root directory.
The Installation Process
First, copy the entire contents of the Original folder to your desktop as a backup. Seriously. The game updates and other mods sometimes overwrite the same files, and you want to be able to roll back without reinstalling the whole game. Then take the DX12 version of the mod files and copy them into your Lost Judgment installation directory, which is usually something like C:\Program Files\Steam\steamapps\common\LostJudgment. Make sure you're putting them in the correct folder, not some subfolder within it. Launch the game once to verify it runs before you do anything else. I skip this step sometimes when I'm in a hurry and it always comes back to bite me. Once the game starts normally, quit it completely. Don't just minimize it. Right-click your Steam library icon for Lost Judgment, go to Properties, set the launch options to include "-dx12", then close the Properties window. This forces the game into DirectX 12 mode, which is what the mod is built for. Start the game again. You should see the SH4EFakerR3.dll hook message in your console output if reShade is set up correctly. If you don't see that, check whether the DLL is actually in the right directory and whether your reShade installation matches the game version.
Common Problems and What Actually Works
The biggest issue people run into is texture flickering during cutscenes. The model swap works fine in gameplay, but during scripted sequences the textures can go wild. The workaround I found is to lower your texture quality setting in the game options to Normal instead of High. It cuts visual fidelity a bit but stabilizes the flickering almost entirely. I kept it on High for a while and ended up resetting the shader cache twice before I figured out the texture setting was the real culprit. Another problem is the mod conflicting with other model-swapping mods. If you're running multiple character overhauls, pick only one model swap at a time. The game engine doesn't handle overlapping SH4EFaker hooks well, and you'll get black models or a crashed game. I ran both this and a different uniform mod simultaneously once and spent about forty minutes troubleshooting before just uninstalling one and moving on. Sometimes the model looks wrong on female characters because the body rig doesn't match. The Hiroki Yagami outfit was designed for male body types in the game. If you swap it onto a female NPC model, the proportions look off. There's no fix for that other than selectively applying it only to male NPCs, which the readme describes in detail. Read the included text file before you start changing things.
Get the Full Details

Uninstallation
If it doesn't work out for you, move the mod files out of the game folder and paste your Original backup back in. Reset the launch options to remove the -dx12 flag. The game should return to normal immediately. No registry changes or leftover files that I've noticed.
Where to Find It
The most reliable source I've used is the official thread on neoseeker's forum under the Lost Judgment modding section. There's also a mirror on NexusMods that gets updated when the creator pushes new versions. Avoid random torrent sites for this because you can't verify the file integrity and someone might bundle unwanted stuff in there.