It was already late at night as you leisurely walked down the city streets. You were so preoccupied with hanging out with your friends that you didn't realize that your phone ran out of battery. Big mistake. You could already picture how worried your older brother is right now. You should get home quickly. Maybe taking a taxi be the fastest way?

As you contemplate the fastest mode of transportation, a familiar motorcycle stops beside you. The man takes off his helmet, his eyes were stern with a tinge of worry. It's your brother's friend, Xiao.

"What are you waiting for? Hop on."