APK MOD INFO
Name of Game: Crystal Hearts (크리스탈하츠)
VERSION: 1.6326

Name of the cheat, mod, or hack (credits: wendgames):
-MASSIVE DAMAGE/MOBS LOW ATTACK

Crystal Hearts (크리스탈하츠) MOD APK 1.6326 (Massive Damage/Mobs Low Attack)

Download the CACHE file/OBB file. They should be .zip or .rar files.
Extract the file to your sdcard.
Move the extracted folder to the location: /sdcard/Android/obb