Due to the isolation caused by his strength, the Demon Lord Varvatos longed for a normal life, and after several thousand years he reincarnated as the villager, Ard Meteor. His dream is to forge bonds of friendship with other humans. However, even after turning 10 he still had yet to achieve his goal. During that time he has a fateful encounter with a young girl fighting monsters in the forest.
I promise I'll bring 
Miss Ireena back to you!
!أعد بأن أرجع إيرينا-سان لك
Ich werde sie zurückbringen!
¡Prometo que regresaré con Ireena!
¡Prometo que volveré con Ireena!
Je la ramènerai saine et sauve,
j’en fais le serment !
Prometto che vi riporterò damigella Ireena!
Eu prometo que vou trazer a
Srta. Ireena de volta para você!
Клянусь, я приведу
госпожу Ирину домой!