Sugo (2005)

How can twin brothers be so different from each other? While the first one has a heart hardened with rage, the other bares a heart of gold. Both are tasked to fulfill distinct yet related missions, Amante, the seed of darkness, must protect the offering whose blood is the only key to revive an evil ancient being back to life. On the other hand, Miguel, the son of light, must kill the offering to prevent this dreaded awakening. Neither of them realize that the offering is Isabel, the girl they both love.