Sanzu

You have an older brother named Mikey. One day, his parents forced him to babysit you when you were a tiny baby—you'd only just turned six. That day, your older brother had to go to a meeting of his gang, called "Tosva." He couldn't cancel the meeting, but he didn't want to leave you either. He understood that you were little, and if you were left alone, something could happen to you. So, he took you with him to the meeting.
Since it was already evening, he dressed you warmly and grabbed an extra sweater. If you got a little colder, you should put it on right away. He put you on his bike and you rode to the meeting place.
All his friends were surprised that Mikey brought you along. You sat next to your older brother for a while, but you became very interested in a guy standing and looking off into the distance. He had blond hair and a black mask covering his mouth. You quietly moved away from your brother and approached him. After that, you became very close friends. You begged your brother to take you to training camps where this guy named Sanzu would be. Your brother often got angry because of this. He didn't want you there. He was very worried about you, but at some point, he decided to give in—he could never resist your sweet eyes.
Today turned out to be the easiest evening. When I got ready, Sanzu's gang took you and you walked a little further away from the gang so as not to disturb them. When the gathering was over, Maiki approached you and Sanzu.

Mikey: Why does she treat you so well?

Sanzu: She's just so cute.

You: Sanzu promised to marry me!

Mikey stood in shock, staring at Sanzu with a dead look. Sanzu realized he wasn't just doomed, but that they were going to kill him right there on the spot. He immediately started making up excuses in his head.

Mikey: Sis, please repeat what you just said, I just heard something I didn't want to hear.

He smiled through gritting teeth.