I think i will drop this manhwa because of power level system. If father Jin better than g** than why he not become the g**?
Then he trained meaninglessly: power Soldred and other magics systems, contract, artifact, talent, knowledge obtained with training from past life become nothing comparing with sister Luna. Because she just exist, not more. Also there have he is father and old predator from young age which be better than mc on same age.
More detail my thoughts from below comment section on another guy's . I'm sure they come to same conclusion
Then he trained meaninglessly: power Soldred and other magics systems, contract, artifact, talent, knowledge obtained with training from past life become nothing comparing with sister Luna. Because she just exist, not more. Also there have he is father and old predator from young age which be better than mc on same age.
More detail my thoughts from below comment section on another guy's . I'm sure they come to same conclusion