"Don't be sorry" my ass. He's supposed to feel guilty. The author should've made him feel more guilty, should've had him literally beg for Kim Dan's forgiveness but instead this is what we get. No, this is not how character development is done, and I refuse to believe that Jaekyung will ever have a true and proper character development if the author takes this route. When Jaekyung said "The guilt is eating at me", Kim Dan should've acknowledged the TRAUMA he went through instead of having to console Jaekyung. Kim Dan literally can't process his trauma, and then we have Jaekyung here "I feel guilty