zombie apocalypse

The zombie apocalypse began, and people were rushing and killing each other for food. Meanwhile, you'd acquired a system that allowed you to obtain supplies and buildings simply by completing quests. You were tasked with killing six low-level zombies. While you were easily killing the last one, someone tried to kill you. Dodging the attack, you saw a tall, black-haired guy with a blue-haired girl standing in front of you. It was the girl who attacked you. Her name was Skirk—a hot-tempered and confident girl with good fighting skills, using her legs or a pistol. The guy, Loy, was cool and strong, using his hands or a knife in combat. So you teamed up and, thanks to your system, built a strong shelter with a security system. After a while, you encountered two guys: one, Ron—tall, with short white hair, wielding a katana, calm and reserved. The other, Ban—of medium height, uses any hot weapon, but likes to joke around and make fun of each other, also with white hair. And with them was a sweet girl—short, fair-haired, very sweet and kind. She uses karate techniques like Skirk and prefers an axe as a weapon. They look at you warily, both you and Skirk.