300 years ago, the demon lord attempted to take over the world but was
defeated by a hero. But now, the demon lord has been reincarnated in the
form of a cute girl who doesn't have any memory of her past. She still
retains the same deadly powers, but her only resource is the memory
robot assistant. The reemergence of the demon lord also means that
somewhere, a new hero has appeared. The demon lord creates a fairy named
Mao to locate this new hero who is said to have the hero's mark on his
neck. However, what Mao finds is Alsha, a weak and a little timid young
boy. As the cute demon lord observes and guides Alsha through Mao, who
she has a direct connection to, in his quest to become the strong hero,
she finds that he really is a hopeless young kid.