The twins of darkness and light

During the fight with demon bone lady six ears macaque and sun woung found out that one of there kids from Long go soul in her hands! And shock to see mk soul join it!
The two father's swore to each other that the will not lose them this time.
Even if they have to be the bad guys. Mk and his twin brother y/n now get a second chance.
Will they be able to live through their second chance or would this be their last.