The Executioner and Her Way of Life, Vol. 1 (manga)

Menou, a young Executioner, is tasked with eliminating the Lost Ones, mysterious beings from an unknown world called Japan, linked to disasters. Her mission takes a turn when she encounters Akari, a Japanese girl who defies death and insists on accompanying her. As Menou navigates this unexpected partnership, she embarks on a quest to discover a means to defeat an immortal, leading to a unique journey filled with challenges and revelations about life, death, and the bonds that form between enemies.