One piece: Admiral StormFist

"Bahahahaha Sengoku... I have got myself a new grandkid."
Monkey D Garp laughed while looking at the unconscious boy who had just washed over on the shore.

This is the story of Shin.
The only grandson of Garp who will be joining the Marines.

No Logia rumble rumble... But lightning will go BRrrrrrrRrr.