The Amamiya Brothers, Masaki and Hiroto, keep looking for their older brother Takeru who disappeared one year ago. The three Amamiya brothers lost their parents when they were young. Since then, they relied only on each other. On the anniversary of their parents' death, Masaki and Hiroto expect Takeru to appear. Instead, they meet a person who has a clue on Takeru's whereabouts.

The students of Suzuran High compete for the King of School title. An ex-graduate yakuza is sent to kill the son of a criminal group, but he can't make himself do it as he reminds him of his youth.

After completing his time in a juvenile detention center, Daiki Imanishi returns to his hometown in Ibaraki. Upon hearing that his former cellmate, Ken Kohinata, is in danger, Daiki, along with two companions he met in the detention center—Kaito Sakaguchi and Ryuichi Maki—causes trouble at every turn as they head to Tokyo in a stolen car to save Ken.

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Chiku is a devastated and dangerous town with 5 gangs fighting fiercely. Mugen and the Amamiya Brothers clashed, leading to Mugen disbanding.

Tatsuya, a former gang leader, seeks a fresh start after juvenile detention but quickly finds himself entangled in a gang rivalry. Amidst the chaos, he forms unexpected bonds with Kaname, a rival gang member, and Chihiro, the sister of a late gang leader, as they navigate the dangerous gang world together.

In the year 199X, on the dark, shady streets of New Kabuki Town, the free-for-all between gangs of young delinquents and a corrupt police force is further complicated by the appearance of a mysterious girl named Asuka.

A powerful new enemy appears in front of 3 gangs: Gokuraku Cho, Biisuto and Hiroshima Naitsu. Based on the manga "BADBOYS" by Hiroshi Tanaka (published from 1988 to 1996 by Shonen Gahosha through biweekly manga magazine Young King).

"BLOW THE NIGHT!" Let's Spend the Night Together is a 1983 Japanese docu-drama shot on 16mm film starring actual Yanki gang members as many of the main characters.

Three years after the event of the series, Takashi Mitsuhashi and Shinji Ito face the new enemies.

Members of SWORD win against Wangan Rengogun, which is led by Kohaku. The city becomes peaceful again. Nevertheless, the most brutal gangs, Doubt and Prison Gang, appear. They try to dominate the area controlled by SWORD.