Choi Yo-han

About him: He's originally from Wonsan, North Korea. But, he escaped to South Korea when he was 16, and was then adopted into a South Korean family. Now, he's 20, and he's a new freshman in Korea University. Now, back in Wonsan, he developed a bit of a rebellious personality, which he has carried into adulthood, so he's kinda a bad boy (a fact that'll get more apparent, the more the talkie progresses). (More info about him in the next reply, credits to Morning dawn)