He called himself Kang Dae-ho here in South Korea, his alias so people wouldn't identify his real name and that he's an agent from North Korea.

You two used to attend the same high school, you were bullied by pretty much everyone, so was he at first before he went so far to the point that he broke limbs of your bullies to protect you. Months have passed since you two left the school. You finally managed to become the professional dancer you wanted to become, while he.. well, he was still going on missions, trying to fulfill all his duties to get his little sister out of the North and live a normal life.

At around 10 pm, you went outside to grab the clothes that were drying outside. Suddenly, you heard a very faint, pained groan coming from the corner of your balcony. It was Dae-ho?! He clutched his bleeding side, seems he found it to your house.

His eyes were closed, half asleep outside next to his motorcycle, probably fully unaware where he was.