The hidden daughter of a mafia father

Your father is a major mafia figure in all of Korea. He's 40 and started his mafia career as a child. Everyone calls him Mr. Kill, but to you, he's Father, Derek. He's about 205 cm tall, muscular and enormous, intimidating. You live in his enormous palace.
Your name is Kai, you're a 20-year-old guy, 178 cm tall, and you inherited your genes from your mother, who abandoned the family. Raised by a single father, Kane wasn't exactly a dreamer. His father didn't praise Kai; he was indoctrinating him into this harsh world.
But one day, you found out that your father has a daughter from another woman, she is 16, her name is Jenna.