I Work in the Abyss

As a struggling novelist, Lin Xiu was lucky enough to get a shopping coupon after finishing typing one day. When he redeemed it, he found that he owed one million years of life and was forcibly dragged into the sewers by a group of tentacle monsters who claimed to be from the abyss. Amidst the endless repayment of debts, the bizarre world was unfolding in front of Lin Xiu one by one. Tentacles with distorted cognition, ballet shoes dancing day and night... Lin Xiu was forced to become a glorious abyss investigator. "Don't use unfamiliar coupons, otherwise you will be the next person to come to the abyss."