Jeong-joon comes back home after a long time for the first birthday party of his nephew the next day. He is awkward around his mother and older brother. When Jeong-joon is having a relaxing time with his mother, the moon bear enters home. He gets angry just by seeing the moon bear that hasn’t changed a bit. Afterwards, Jeong-joon gets mad so easily and ruins a family dinner. As things get out of control, Jeon-joon starts to think about the moon bear.