After ending up in a crossover anime world, Zhou Mu opened an unremarkable little shop. Then a guy with Ichigo's face showed up asking for credit. "Boss, let me owe you for a sword." A guy wearing Sasuke's face came asking for credit too. "Are these eyes enough to cover the debt?", Until they realized what they owed wasn't money, but their lives.
[Conflict bomb] The Bleach crowd puts Soul Reapers on credit, the Naruto crowd puts the Sharingan on credit, and the One Piece crowd puts Devil Fruits on credit. They all swagger in without a care, until they see the names written in the credit book start to burn.
[A hint at his ability] Zhou Mu's ledger is called the "Book of Karma." Debts are repaid with lives, fair and square. The greater your power, the more you owe.
[A taste of the payoff] When protagonists from every world are bitten back by their own cheat abilities and kneel at the shop entrance begging him to collect, Zhou Mu simply turns a page at his leisure. "It's time to repay your karmic debt."
