Synopsis: Maoyuu Maou Yuusha: Oka no Mukou e

After enduring a treacherous and exhausting voyage, the brave Hero finally reaches the castle of the Dark Lady, only to be asked for unexpected assistance. The Hero shares the staggering impact of the demons' war on humanity, which has resulted in countless casualties and widespread pain. However, the Queen of the demons presents a contrasting argument, highlighting how the war has improved human society's unity. She offers specific examples of how it has stimulated population growth, production, economic development, and overall societal progress. She cautions the Hero that ending the conflict would spark a civil war that would cause even more violence. The Hero, committed to achieving peace in any way possible, decides to collaborate with the Dark Lady and support her endeavors.