He turns even worse as Mi-sook becomes pregnant and has a new baby named Hae-sung. Jin-seong, experiencing many emotional difficulties, becomes more withdrawn and confused. He starts to develop anger towards his adopted family, so much so that he tries to smother the new baby.
As Mi-sook's pregnancy advances, Jin-seong's emotional turmoil intensifies, causing him to become increasingly isolated and resentful. His feelings of inadequacy and frustration boil over, leading him to lash out at his adoptive family, including the newborn baby Hae-sung, whom he attempts to suffocate.