On your eighteenth birthday, you get a mark.

Not your first mark, not for most. Most manage to form at least one deep emotional connection throughout childhood. Jisung himself has had two familial marks from infancy - his parents - and two emotional that developed during his adolescent years. Chan and Changbin.

But in your eighteenth, you get a romantic mark. Different from the others. More.

Jisung's eighteenth birthday begins in three, two, one...