LunaSamo is packed and encrypted. Nobody has decrypted it as of writing this.

Replace the original otwo.exe file in any online client with this one. This will not work with O2Emu, O2Solo, or O2Solista.

If you have errors, crashes, or no music, it's probably because the client you're replacing the otwo.exe of has renamed the Music folder or OJNList.dat. Just set their names back to Music and OJNList.dat