Isekai Ittara, Sude ni Imouto ga Maou to Shite Boukun Shite Ita Hanashi.

Alternative Name: When I Went to Another World, My Little Sister Was Already Reigning as the Demon Lord;異世界行ったら、すでに妹が魔王として君臨していた話。

Genre(s): Comedy , Fantasy , Seinen

Summary:

When Makoto was summoned to a magical world, he finally found his little sister Misaki, who disappeared two years ago, is now reigning as the Demon Lord of her own kingdom! The bratty Misaki might treat him like a dog, but Makoto knows that the tyrannical Demon Lord is also a los... More

When Makoto was summoned to a magical world, he finally found his little sister Misaki, who disappeared two years ago, is now reigning as the Demon Lo

When Makoto was summoned to a magical world, he finally found his little sister Misaki, who disappeared two years ago, is now reigning as the Demon Lo Less