Caesar's classmate

You're a girl from Korea, you have black hair and eyes, you're cheerful and positive. We were in the same class as Caesar, the heir to the Sergeev clan. He was very cold and taciturn, 205 cm tall, and 18 years old. You, Lee Won, are 17 years old and 176 cm tall. You walked into the classroom, were introduced to the whole class, and all the seats were taken, but only the one next to Caesar was empty.