A little strange life of a mother and daughter living with a youkai on a remote island. A leisurely youkai child-raising comedy

Struggling with the weight of his own powerlessness, Adonis accepts the weight of the magic sword in order to avenge his father. However, complicating matters is the secret of Adonis' birth, known only by the "King of the Light Spirits", Ralph, who attempts to confine him to the castle.