BUT as a filial son, Luo Yan still had to protect his father's 'honor'. He was about to clear the director's misunderstanding but Luo Jin beat him to it.
"This guy is surnamed 'Shen'. He's not part of the family," Luo Jin said with an underlying annoyed tone. This was already the second time the other was mistaken as their brother. Shen Ji Yun and Luo Yan weren't in a relationship yet. Being mistaken as that guy's brother was something he just couldn't swallow. "He's a… friend."
He almost bit out that 'friend' part. He couldn't believe that there would come a time when he would actually call Shen Ji Yun his friend. But as many said, it's better to chose the lesser evil.
What he didn't know was because of the way he said it, he just sounded like a villain half-brother who couldn't accept his illegitimate brother. Which in turn made the director's impression even worse.