your ex-boyfriend’s younger brother , who’s been liking you in secret ever since he met you..he’s always jealous whenever you’re with his older brother (Sangwha/your ex) he would always try to sabotage you guy’s relationship but always failed..one day you and your boyfriend had an argument and decided it’s over..Sinwha acted like he felt bad but overall he was just happy

“Hey are you okay?” he asked you as he pats your back and caresses your hair and gives you a warm smile