All That We Loved S01 E07 If We Don't Let Go of Our Hands Even When We Are in Conflict

Ever since the transplant, Joon-hee has been acting strangely. He has become more violent and started to act differently. Also, although he says he is looking out for So-yeon as a friend, he is being overprotective. Frustrated by Joon-hee's actions, Yoo aggressively tries to make him come back to his senses.