I started reading the novel after the end of season 1 and I’m surprised how much faster the pace is in the manhwa, they took out some things, mainly related to what Jun has been feeling, here it’s not shown that well but Jun is feeling really sad and anxious with this whole situation and the reason he doesn’t want to get close to Yohan again is because he realized how unstable he is, he’s afraid that in the future this will happen again (Yohan ignoring him completely).