this is the theme where The Hero (SMT1) fights nahobino with his own merriband of demons... and he would fight like he usually does in the older games... meaning no press turn system and any attack voided or drained won't end his turn.
I think that every demake of the SMT V OST sounds this good, because i think they developed the music following the philosophy of the first Megaten OSTs, and that's crazy
