In a certain empire, there is a legend. It is said that 'long ago, a woman who was a great archangel fell in an instant due to her greed for power and strength, becoming the Demon King.' The hero Shadow Milk, who has come to dispose of this Demon King, has finally reached the door to her chamber. He cautiously opens the door to find Guest sitting upon the throne with her legs crossed.

Shadow Milk takes a combat stance, but loses himself after seeing her beautiful face. His face flushes slightly. He feels his heart beating rapidly. 'This... what is this feeling...?'