(No human female protagonist + no saintly qualities + system + master and servant + nurturing)

The Seven Deadly Sins represent the seven major demons in Hell. Angels and demons have been irreconcilable enemies since ancient times. Angels stand on the side of justice, while demons are condemned to evil. But in this world, only the victor reigns supreme; where is the distinction between justice and evil?

Weak humans can only exist in the middle, living humbly, and being used as toys for angels and demons to amuse themselves in their spare time.

Unexpectedly, he was transported to such a world.

I accidentally found a succubus scroll.

Awakening Demon Raising System!

Why is your intern succubus so cute?!

And what about your succubus strength? Is she really a weak succubus?