Kiichi Someya Husbando

The story starts with Kiichi aged three, living with his parents. After they are murdered he runs away and lives with some homeless people for a while, he ends up surviving in the woods for nearly a year before being returned to his grandparents. In the second arc of the series, Kiichi teams up with an much more verbal and intelligent friend. They attempt to save a girl from classroom bullies. (https://allmanga.to/character/25691/kiichi-someya)