The Rotten System Forces Me to Become an Immortal

No CP, Cultivation, Fantasy, or Ensemble Casts Are All Fine, as Long as They’re Logical, Creative, and Not Absurd

I'd like something like The Female Side Character Cultivates Immortality, but Has Infinite Save Files. No CP, preferably cultivation, fantasy, immortal cultivation, or historical settings. I want logical plots and intelligent characters, not absurdity. The story should have its own ideas instead of following the same old formula.