Isekai Maou to Shoukan Shoujo no Dorei Majutsu

Synopsis

Diablo manages to defeat the Force Hydra despite its regeneration by completely incinerating it. Shera asks him to spare Keera as he is still her brother and he agrees, but Chester appears and beheads Keera. Chester has his army round up the already beaten Elf troops and attempts to capture Shera, stating his plans to conquer Greenwood. Chester traps Diablo in an energy sphere and destroys Alicia's sword when she tries to defend Shera. Diablo breaks free and battles Chester, evenly matched, and narrowly manages to win. Alicia threatens to report Chester's unethical actions to the King, so he surrenders and withdraws his troops. The group heals the Elf troops with potions and comforts Shera over the loss of her brother. Later, Sylvie serves an exhausted Diablo a drink meant to restore energy, but he becomes drunk and mistakes her for a body pillow. He grabs and caresses her, much to her embarrassment.

(Source: Wikipedia)