I Got the System but She Actually Wanted to Change the Host

"I got the system but she actually wanted to change the host" In the third week of the zombie outbreak, the Internet collapsed and rescue broadcasts went silent. I hid in my home on the 20th floor, surviving on hoarded instant noodles and mineral water. Until that girl with silver-white hair appeared out of thin air in my living room. She put her hands on her hips, raised her chin slightly, and declared proudly: "Congratulations, lucky guy! I am the 'doomsday novice to boss system'." ... Is a system with such a careless name really reliable? Big gift package for newbies? Lost it. System store? Doesn't exist. The only ability is environmental scanning - which should be used sparingly because she is solar powered. Well, at least it's better than nothing. Under her guidance, I walked out of the door, picked up a survivor named Li Ke from the 18th floor, and then escaped to the rooftop after being chased by zombies. You never know what's behind the next door is an ally, a corpse, or another "survivor" more dangerous than you. What's even more outrageous is that this system always says, "Next time you go on an adventure alone, I will change the host!" Change host? You should find someone better than me. --- [Reading Tips] ✓Apocalyptic survival + light comedy, there are zombies but not scary, there are battles but not cruelty to the master ✓The system is a living treasure, the host is the one responsible for making complaints, and the heroine (?) Is a tsundere white-haired beautiful girl ✓Slow-burning group portrait, with partners and betrayals, warmth and calculations ✓Sniper rifle, convenience store, rooftop, clock tower - the end of one person, the salvation of a group of people