Astarotte no Omocha! EX OVA.Tasked with homework based on self-research, Asuha decides to do her research on underwear whilst Astarotte decides to research on a dragon egg found in the World Tree. When the nest falls and breaks, Asuha makes a substitute nest out of everyone's underwear, allowing the egg to hatch. Later, Judit tells of four years ago when Astarotte first met Zelda, who had been training under her master, Attley Reginhard. When a stray alpaca tries to attack Astarotte, Zelda awakens her senses as a guardian, deciding to become Astarotte's bodyguard...