High school student Hayato Katsuragi dies in a traffic accident and is reincarnated as Reivelt Runwalker, the son of a noble in another world.<br><br>At the time of his reincarnation, the goddess bestows upon him a cheat skill with no level limit, but at the same time, he also acquires the most terrifying skill, “The One Afflicted by Hardship”.<br><br>With his life now guaranteed to be in hard mode, Reivelt resolves to undergo training and become stronger.<br><br>While receiving his lessons, he enjoys a happy life alongside his cute maid and his little sister, but then they are attacked by a massive horde of monsters all of a sudden!