The chapter begins with the Skeleton protagonist successfully evolving into an RD rank Close Combat Striker, gaining new skills like Swift Draw and Bone Armor. He encounters a boss, the King of the Bear Mountain, using his new abilities to attack the boss's weak points while also creatively utilizing the boss's gravitational field to enhance his own attacks. Despite weakening the boss, the King suddenly activates a new, unexpected lightning-based attack, leading to concerns about the boss's altered behavior and the Skeleton's safety.