The Demon King's Hourglass – Reborn as a Fairy and Claimed by the Future Demon KingThe Demon King's Hourglass – Reborn as a Fairy and Claimed by the Future Demon King; Maou-sama to Sunadokei ~ Tensei Shitara Yousei-san de Shourai no Maou ni Yama reru Hanashi ~; The Demon King and the Hourglass: A Story about a Fairy Who Is Reincarnated and Becomes a Demon King in the Future; 魔王様と砂時計～転生したら妖精さんで将来の魔王に病まれる話～; Maou-sama to Suna Tokei : Tensei Shitara Yousei-san de Shourai no Maou ni Yamareru Hanashii; Maō-sama to Sunadokei ~ Tensei Shitara Yōsei-san de Shōrai no Maō ni Yama reru Hanashi ~; The Demon King and the Hourglass

The genius boy who is destined to become the final boss demon king loves me, who has been reincarnated as a fairy. Louis, a boy with a talent that surpasses adults as a court magician, lives with his sickly sister and one day catches a fairy in the forest. It is Eleanor, a girl who has been reincarnated in another world as the hero's fairy in this otome game. The palm-sized girl lives in a cage. However, by drinking Louis' blood, she can change to the size of a human woman...? Louis pours his sick love into Eleanor. What is the true purpose of this handsome and promising boy in this world? A fantasy romance about a fairy girl and a terrifyingly beautiful young demon king!