Since .rar is a proprietary compressed format, your operating system cannot open it natively without third-party software [3].
"VNMth.rar" is likely a compressed RAR archive containing files related to visual novels, specifically assets from the Visual Novel Maker (VNM) software or localized Vietnamese ("VN") translation patches [1, 2, 3]. VNMth.rar
Files with this naming convention generally fall into one of three categories: official developer page
Be highly suspicious if extracting the file yields .exe , .bat , or .scr files when you are only expecting images, audio, or game data. or trusted translation team.
Only open the archive if you downloaded it from a reputable community forum, official developer page, or trusted translation team.