MTL - Hokage: Ryo’s Path - Chapter 341 Dumb loss

Seven billion humans living on the Earth time-traveled together after they had woken up one morning. They all heard a synthesized female voice.

10 years searching for his lost sibling.

Kain, a young teenager, accidentally lost in a Dungeon and awakened a special system. A system that allows him to continuously return to level 0, using his level to add and increase his skill points. From there, Kain began his journey to find the truth of this world, and when he took off that mask, what he saw was...