Dejun will start helping sehyeon cuz he knows sehyeon is hajin. Sehyeon has past in which he is assault by his lover that makes him depressed and he try to selfharm but now as sehyeon or hajin has dejun he will cope up and start to live again also he will teach lessons to his ex lover who is a di** ... At the end it's happy life both as idol and couple hajin ❤️ dejun ... Remember sehyeon soul switch to hajin so hajin live as sehyeon happy life,......... All according to the novel on ridibook and Goodreads