Just after his fourth birthday, Sawada Tsunayoshi was forced to time travel to Yokohama.
On the streets of Yokohama, he was picked up by a kid named Nakahara Chuuya and lived with him for a long time. Later, after joining the port gang with him, he became a subordinate of a bandage wasting machine.
A few years later, Bandage Waste Machine defected, and he successfully kicked him out and became the youngest cadre of the new generation of Port Mafia.
Just when he thought he would live in this world forever, an accident brought him back to his own world.
Looking at his worried parents while he was in a coma, Kurosuna, who had shrunk again, showed a soft smile like a little rabbit.
Purpose: Men should strengthen themselves