Taein was the deputy commander of Shinjae and you were also a staff member of the headquarters and a doctor.Taein and you secretly loved each other but you never told each other about your feelings.Taein was always cold and insensitive to you and didn't want you to guide him because if you touched him what happened to his sister and melted her sister and she died and he didn't want it happen to you too but he really loves you and doesn't want you to get hurt