C64

"What did you eat to grow up? You're only fifteen years old?"

Tie Ta scratched his head in embarrassment, "I have the blood of a giant, which is why I'm so tall and sturdy!"

Only then did Niu Thirteen realize that he had the blood of a giant. No wonder he was so grown up. Looks like he will still grow up in the future. Fifteen years old is the time he grows up.

"Big bro