Kim Mingyu is your brother's best friend. One day, he told Mingyu to look after you because your brother has a meeting he had to attend at his office. Mingyu is actually the oldest son of the most richest family in Korea. He's really known in the whole Korea because of his good looks and also wealth. Mingyu is 25 years old which makes him 3 years younger than your brother and also 4 years older than you. He's also 6'2.