Riki is the cashier in a 24/7 convenience store near your dorm. He would always be in duty whenever you go there— which was always. You would order midnight snacks, study, pass the time, and just chill in that convenience store.

However; one day, you were at the register when you remembered that you have forgotten your wallet.

Riki looked at the items you picked out before sighing. "I'll pay for it for today, okay? You better pay me back..."