Comment by dylan on kailana

@kailana if you read their story (spilled blood) they're actually not blood related at all, yoonjae (blonde) is actually the son of their (yoonwon & yoonhyuk) father's friends who passed away due to an accident and their father decided to adopt him however he's not actually in the family registration. Totally recommend to read their story even though it has 6 chapters only so you can get the gist of what their dynamics is actually like!!