Mamono Musume: Spider & Harpy & Cyclops

Amidst a war between humans and monsters, the spider princess Arachne was at the height of her boredom.
She spent every day stuck in a castle in the middle of nowhere,
watching the same mundane events play out over and over.
She even tried to provoke her assistants, the harpy Rupuia and the cyclops Cyc,
into some fiery entertainment to no avail.
At her wits' end, Arachne came up with a new plan to rid herself of boredom - a summoning ritual.