Reborn as a Baby, I Slowly Grow Stronger

An overworked office drone transmigrates into the body of a newborn baby. Looking at the impoverished house with nothing but bare walls, he begins to explore. Starting as a helpless infant, he grows stronger bit by bit until he becomes an all-powerful figure in this world.

This is a slow-burn story about the protagonist's gradual growth, following his journey from infancy onward.