I have been a long of time searching for this song. Finally, yesterday i noticed that it is from Romancing Saga and it name is Beat them up!. Now I only have to discover where is this cover from and where i can get a 320kbps/FLAC version. So if you can help me, here is the video source where you can heard it version:

https://www.youtube.com/watch?v=ASO5apu3ZM0

Thanks in advance for any help!

It seems to be harder than i expected. Can anybody tell me the music style?

You will likely have more luck putting this in the video game music request section.

It's an Original Soundtrack. Although it resembles many pieces, it was composed for the game (1992). Developer/Publisher: Square. Composer: Kenji Ito.

Other Kenji Ito stuff: Kenji Ito - Topic - YouTube (http://www.youtube.com/channel/UC8QJqmFlQLz-oBvhDj2L3Ww/videos)