Return Favor Strongly

Qingli rescued an injured puppy, took him home, bathed him and held him to sleep every day. But one day he suddenly disappeared. Soon after, a handsome man came and said he wanted to repay the favor. Qingli: "What kind of favor can I repay?" Wolf King: "Six months ago, you saved a wolf." Qingli: "No." Wolf King: "Xiao Hei..." Qingli: "..." There are countless ways to repay kindness, so why did he have to commit himself to it...