Shitsuren Maid wa Bikei Gunjin ni Dekiai sareru: Jitsu wa Saikyou Majutsu no Tsukaite deshita

Lilith works as a maid for the young master of the Gratton family. Although she secretly harbors feelings for him, he suddenly marries and her new wife fires her! Devastated, Lilith is hired as a maid and fake fiancé for six months by the handsome, womanizing, and most powerful soldier, Dunkirk. However, he treats Lilith with the utmost kindness from the bottom of his heart! On top of that, there is a secret behind Lilith's powers... The world's most powerful love story begins with heartbreak! (Source: Kadokawa, translated)