Family Reunion

Through a letter sent by his father, the bald hero, Saitama, receives the news that his grandfather has died. Along with his self-proclaimed disciple, Genos, he travels to the funeral, where he reunites with his parents and younger sister. After the funeral, the bald hero learns that his parents will be traveling around the world, and because of this, they leave his sister in the care of the Caped Baldy.