Manga Like Secret Family

Kang Geon, 17, transfers to a prestigious high school for only the top 0.1% of South Korean students. Raised as a secret agent in North Korea since the age of five, he is a genius and a human weapon. He is tasked with infiltrating South Korea's upper class and building connections. However, making friends proves to be a much bigger mission. This spy action drama follows Kang Geon, who lives as a fake family with his hacker father, who is under international surveillance, and his legendary assassin mother, and finds true happiness! (Source: KakaoPage, translated)