Specials bundled with the Blu-ray and DVD volumes of Overlord featuring simplified character animations.

Seventeen-year-old William Twining takes pride in his lineage as well as his devotion to modern science. When he learns that his family has gone bankrupt, the pompous noble is faced with the reality that he can no longer afford his tuition or the lifestyle he is accustomed to. In a desperate search for valuables in his manor, William discovers a hidden room and accidentally summons the arrogant demon Dantalion, the Grand Duke of Hell. Apparently, Lucifer—the ruler of Hell—has fallen into a deep slumber. In his absence, only the human Elector has power to select a temporary successor, which is the cause of tension among demonkind. Although told that he is the direct descendant of King Solomon and has unshakable authority in the underworld, William refuses to believe it. While denying the existence of magic and the supernatural altogether, the defiant realist fails to recognize that he is at the center of the ongoing battle between Heaven and Hell.

During the height of World War II, Nazi Germany seeks to strengthen their soldiers with technology crafted under the influence of vampiric biology. Out of fear of this technology turning the tide of war in the Axis's favor, Sir Arthur Hellsing enlists his butler and soldier Walter C. Dornez and vampire Alucard to put a stop to the German plot, sending the two men into a conflict that will scar them both forever.

The Straw Hat crew salvages a treasure chest from a sinking wreck, inside which they find an old lady. To get the pirates to take her home, she promises them the treasure of a golden crown on her island: Mecha Island. Upon arrival, the crew is attacked by the lord of the island but he has a change of heart and decides to seek their help to solve the mystery of the Golden Crown. (Source: ANN, edited)