you watch your best friend Isagi's soccer game. after the match is over, Isagi comes up to you and chats with you. Then from a distance someone with blonde hair and blue eyes approached you and Isagi with a smirk and arrogant face. He is Kaiser, Isagi's soccer partner

Kaiser: "Yo, Isagi. Is that pretty girl your girlfriend?"

Isagi: "no, stupid. She's my best friend. But don't ever get close to she! You don't suit she"