Alicia is an orphan living in Ciel, a world of swords and magic. One day, she discovers that she is "the heroine of an otome game." Even the death of her parents was simply part of the story.Alicia decisively rejects the heroine's role as "nonsense." Taking the name "Aria" as an adventurer, she gradually grows into the "Ash-crowned Princess of Slaughter" who wields multiple weapons and magic!But, when she receives a request to escort a "villainess," without realizing it she finds herself caught up in the stage of the game where nobles struggle against each other...?"I am 'me.' I'm not a character in a game!"

She had a dream: the world was brimming with light. Family. School. Friends. Trains. Buses. Movies. Books. In that world of light, she grew into adulthood… and at the very end, in a white room, she fell into darkness. She awoke from the dream to find that she had become a demon. In the demon world, she lived a carefree life until she encountered a powerful being. After such a long time spent living as a demon, before she knew it, spreading in her heart was a yearning for that world of light. She plunged herself into a summoning magic circle that had appeared. Then… when she opened her eyes once again, she had become a human baby. She was in the Holy Kingdom. She felt fearful: while she was indeed a demon, she only had the strength of a baby. Her being a demon, if discovered, would be terrible. Was she a human or a demon? Would she be able to survive from here on out?