Installation:

1: Install this mod:
https://www.gta5-mods.com/player/mai-korean-bikini-insanogames-alex189 

2: Extract the "uppr_diff_001_a_pak.dds" file

3 Using OpenIV, add it to "F:\SteamLibrary\steamapps\common\Grand Theft Auto V\mods\update\x64\dlcpacks\addonpeds\dlc.rpf\peds.rpf\MaikoreanBikini.ytd"