The demon princess of the magical world. Because angels drove demons out of the demon world, Lucia and her family were forced to live in poverty. As a result, her mother left them and Lucia had to live with her father, Satan, who runs 50 square meter ramen shop named "Hell's Ramen King". When her father heard about unusual birth date of Yuta Koizumi (double 666) he told Lucia to procreate with Yuta, so that with their child they would be able to turn tables and retake demon world.

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