An explosion in Leibo Street killed Mingze's identified brother. Mingze was very worried, fearing that his cute black ball brother who had not yet turned into a human would not have enough to eat or clothing to keep him warm. However, I am still with the child who was picked up. For seven years, he settled in Yokohama with his boss, Yukichi Fukuzawa, and worked part-time as a bodyguard. Ou Senwai, the second eldest son of the family, takes him to the battlefield every day and works part-time as a killer. One day seven years later, I suddenly heard some news that the person who caused the explosion was caught.
Purpose: A funny journey to find a younger brother