The nameless protagonist fell asleep while playing an online game. However, he awoke in a strange world with his in game characters' appearance. In a state of shock, he noticed that he was equipped with nothing but his strongest weapon and armor.

To make matters worse, our hero's appearance was changed by the special avatar skin "Skeleton" when he enters this new world; he truly becomes a Skeleton Knight. He adopts the name of his in game character, "Arc", as his identity. After getting involved with an elven girl, things quickly unravel and new adventures beckon. So begins his quest to find answers, to not attract too much attention and to thrive in this world.