At long last, Yumiella and her companions reach the Demon Lord's castle, but his power is so great that she's the only one who stands a chance against him. Then the Demon Lord tells them the true story of his connection to Valschein's royal family.
I guess it's a happy ending.
.أظن أنها نهاية سعيدة
Terminamos en un final feliz.
Ha acabado en un final feliz.
Tout est bien qui finit bien.
Acho que tivemos um final feliz.
Полагаю, это счастливая концовка.