Demon Queen–sama Can't Defeat Hero-kun.女魔王様はゆうしゃくんを倒せない。 ; Onnamao-sama ha Yuusha-kun wo Taosenai. ; Onnamao-sama ha Yusha-kun wo taosenai. ; Onnamaou-sama wa Yuusha-kun o Taosenai. ; The Demon Queen Can't Defeat Yuusha-kun.

Demon Queen Abyss is worried… She's not able to defeat the Hero, considered the mortal enemy of the demons. This Hero is still an inexperienced young man—he should be easy to defeat! … However, the problem is that he, not knowing Abyss's true identity, considers her his “Master” and has become very fond of her…!?