In the bustling port of southern Osaka, there is a school called "Nanchong Junior High School". There is no bright future here, only the ashes of being forgotten after the bubble economy burst. In this quagmire, Minato Kyokai Kai is the most troublesome "gangster". He was born like an untamable wild dog, with the undercurrent of the underground world in Nanchong flowing through his veins.
The story begins with the birth of Umi no Kyokai. His father was a member of the local Yakuza organization "Umino Kyogumi" and disappeared due to a failed struggle; his mother was a bartender at an izakaya and disappeared into the sea of people after giving birth to him in despair. Hai Zhixiehai grew up in a pachinko shop at the back door of Nanchong Middle School. He learned to fight amidst the smell of cigarettes and the sound of marbles, and also learned to survive alone in this loveless world.
He is trash in the eyes of teachers and a nightmare in the eyes of classmates. But he has one exception - his half-sister, Xinghai Shazhi. The sand is the only glimmer of light in the dark life of the sea. She is pure and cowardly, but she has blind worship for her brother. In order to protect Shazhi, Hai Zhixiehai even restrained her violence and tried to make her believe that her brother would take her away from this rotten place one day.
However, a bizarre murder that occurred at Osaka Bay Pier completely tore everything apart.
Xinghaisha is dead. Her body was dumped like a broken doll on the harbor breakwater. This was not only a murder, but also the trigger for an all-out war between Osaka's largest "Ume no Kyogumi" group and its old enemy "Shiozhikai". Who killed Shazhi? Is it the cram school teacher who has been coveting her? A rival gang member with a grudge against the Sea of the Sea? Or is it his father's old subordinate who had to kill someone to protect the family's reputation?
With the intervention of the Juvenile Division of the police and the internal purge of the prison, all the evidence - the bloody school uniform fragments, the blurry figure in the surveillance video, and the only witness - all point to an incredible name: Xie Hai of the Sea.
A boy who had never killed anyone turned into a "sister-killing demon" overnight. In order to wash away this overwhelming stigma and track down the real murderer, Hai Zhixiehai was forced to get involved in an adult game that was 10,000 times crueler than school bullying. He must use all the cunning and ruthlessness he learned on the streets to fight the lies that seek to consume him.
But this is not just a story about chasing a murderer. This is about how a teenager, after losing everything, uses his own way to love, hate, and prove that even if the whole world says you are a monster, you still have the right to speak for yourself.
Intention: push back