The Whole World Is Trying to Survive in the Apocalypse, and I'm Selling Wine

[The end of the world + system + group pet + no male protagonist] In order to earn enough to pay for grandma's medical treatment, Gu Ningning is bound to the system to run a tavern in the end of the world. But it's too difficult to run a tavern in the apocalyptic world where order has collapsed! (*꒦ິ⌓꒦ີ) She has to deal with all kinds of difficult customers every day, A low-level psychic who is passive and alcoholic, A hot-tempered mutant orc, And high-level zombies who like to cause destruction... But everyone who comes is a guest, Gu Ningning not only has to take care of the order in the store, We also need to sell as much good wine as possible! But who knew this silent girl who was isolated and looked down upon in school? In the apocalypse, he became the tavern owner that everyone was vying to build relationships with! What should I do if I can't do my math homework? One-to-one full-time tutoring in mathematics, physics and chemistry from talented scientific research academicians~ What should I do if I am bullied because I am too weak? A master with full-level superpowers teaches you fighting skills step by step~ In this way, Gu Ningning embarked on her own road to becoming stronger by selling wine!