Otherworldly Munchkin: Let's Speedrun the Dungeon with Only 1 HP!

Yukito Kirihara is the central character of this story, who leads a withdrawn life until he finds himself reincarnated in a new world. Alongside his beloved sister, Sana, he experiences an idyllic life until an attack from a vicious creature shatters their peace. Subsequently, the siblings are transported to the unfamiliar realm known as the Ever World. Yukito sets out on a mission to find his sister, driven by his love for her, and explores the uncharted territories of this unknown dimension.