If Gu Jin before the age of 18 lived in heaven, then Gu Jin after the age of 18 definitely lived in hell.
Gu Jin, who has been in various professions for four years, bound to the unscrupulous System Master for revenge, and since then has lived a life of love (without) love (shame), mutuality (without killing), and boredom with villains in every world.
P(#￣▽￣#)o