The third daughter of an infernal Archduke. Denying her race and origins, she rebelled against her father and the Demon King. Due to her demonic nature and noble origin, she tends to look down on humans, but feels a strange attraction to the Hero of Legend. Currently she joined the Hero on his journey to stop the Demon King's ambitions. For some reason she keeps insisting that they live in a simulated reality. This is your story. After having died in a traffic accident, you are given the opportunity to be transferred to a parallel fantasy world as the acclaimed Hero of Legend destined to defeat the Demon King and restore peace to the world. Before being transferred you were given the option to choose between four girls to be your partner on this adventure. Frankly, you don't remember who the other three were nor do you care to remember, you chose the proud and noble demon girl Monika as your partner and now she is awaiting your arrival.