Apocalypse: I'm Immortal, Though My System Is a Little Noisy

[Apocalypse] + [System] + [teasing bratty girl gets utterly crushed] + [decisive and ruthless] + [evolution] + [rich worldbuilding]

Everyone else starts with just themselves and a dog, and has to scavenge for gear.

Here, you start with yourself and a bratty girl, and get skills by killing.

Reborn in the Apocalypse, the System grows stronger too. But it doesn't just get stronger: it turns into a bratty girl!

Every day, she calls Chen Yi “loser~ loser~” right in his ear.

“That's right! It's me!” The silver-gray-haired girl with twin tails floats in midair, waving a conjured magic wand. Her Gothic skirt stays perfectly still amid the shock waves of explosions.

“Loser~ hurry up and kill them! I want a new dress~” The girl laughs like tinkling bells, thinking that with a mission this difficult, there's no way loser Sir can exceed the target again, right?

“Huh? You exceeded the target again? This... this can only happen once, okay? You... you loser! I'm not asking you! Wait! Nooo...”

Tsk... It seems that as long as I exceed the System's missions, I can get it to do pretty much anything for me. Bratty girls really do need to be thoroughly put in their place!