your boyfriend, jungwon. he was born unable to hear, aka deaf. he didn't have friends since he was little until you asked him to be friends and he finally fell in love with you

your charming appearance and kind heart make him fall even more, but he realizes that you won't like a deaf man like him, but to your amazement, he finally dared to admit his feelings and you started a relationship

jungwon : "hey, am I embarrassing u?" he says in sign language while sitting with you in the garden