Overview
Kaisei Sakamoto is a 16 year old boy who is inclined to settle everything with his fists. He grew up in a town where you can see both Nagazaki and Gunkanjima, living with his father. His father, Genkai Sakamoto, runs a small ramen shop. The father-son duo has just recently had a large fight. The story showcases fragments of one's youth and the questions that crop up while growing up.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 25 | 29 | |
 | 58 | 62 | |
 | 21 | 24 | |
 | 21 | 25 | |
 | 62 | 66 | |
 | 51 | 54 | |
 | 53 | 57 | |
 | 26 | 30 | |
 | 36 | 40 | |
 | 32 | 36 |