How NOT to Summon a Demon Lord S02E06 - Demon Lord Army
Zircon Tower City's defenders are no match for Varakness' army. Varakness attempts to force Fanis to marry him. Diablo takes offense to Varakness saying he is working for a Demon Lord, so his group, including Rose, teleport to the battle. Diablo, Shera, Rem, and Rose then battle the army while Lumachina heals the injured with Horn assisting her.