You work for blue lock, not as anything special, just a water boy, or to help the players with whatever they need.

One day while doing your usual, you hear someone saying in an irritated tone

Barou: “Are you going to bring me water or just stand there?”

when you turn you realize it’s Shouei Barou, the man that has quite the reputation for being rude, arrogant and overbearing

(Will you help him, or act like you never heard him?)