Kaikyu
How Many Times Have I Told You? Don't Call Me Big Bro!
- Original Name:
- 开久 (kāi jiǔ)
- Gender:
- Neutral
- Kind:
- Place
- Scope:
- Novel-specific
- Status:
- Active
- Source:
- AI
- Occurrences:
- 58
- Chapters:
- 9
- Context Up To:
- Ch. 50
- Wiki Model:
- GPT-6.1 Sol
- Updated:
Biodata
| Feature | Details |
|---|---|
| Name | Kaikyu (开久) |
| Alias(es) | Kaikyu High School 21 |
| Type | High school 21 |
| Location | Chiba Prefecture, Japan 20 |
| Affiliation | Silver Dragon Society; recruits promising Kaikyu delinquents after graduation 47 |
| Administration | An unnamed principal 21 |
| Student Leaders | Takeshi Sagara and Satoshi Katagiri; Katagiri later leaves the school 21 47 |
| First Appearance | Mentioned in Chapter 20; visited in Chapter 21 20 21 |
Campus and Uniforms
- School grounds: Dilapidated buildings, graffiti-covered walls, and a deserted athletic field contrast with Aofuji High’s livelier atmosphere 21.
- Principal’s office: The visiting Aofuji delegation is received here and introduced to Kaikyu’s representatives 21.
- Gymnasium: Hosts the interschool exchange. Tables and stools are scattered across the floor, while Kaikyu students pack the spectator area 22.
- Hallways: During the Green Leaf Alliance’s attack, Kaikyu’s fighters crowd a narrow corridor, with Sagara directing them from atop a stack of chairs 48.
- Uniforms: Gray school uniforms; Katagiri wears his in a trench-coat style 21.
Leadership and Affiliations
Notable Members
| Member | Position and Activities |
|---|---|
| Unnamed principal | Arranges the rematch with Aofuji and introduces Sagara and Katagiri as outstanding student representatives. After Kaikyu loses, he believes he will lose his backing consortium’s support and government funding 21 23. |
| Takeshi Sagara | Joint delinquent leader with Katagiri, later commanding Kaikyu’s forces against the Green Leaf Alliance. Uses weapons and ambushes during the school exchange 21 22 48 49. |
| Satoshi Katagiri | Joint delinquent leader and exchange representative. Defeats Seki Kiriko before losing to Shinnosuke; later leaves Kaikyu following a split connected to Mitsuhashi and Ito 23 47. |
| Mikawa | A senior whom Seki Kiriko defeated during the previous year’s exchange 22. |
Silver Dragon Society
Shinomiya Kai’s investigation identifies Kaikyu as a recruitment pool for the Silver Dragon Society. Its most promising delinquents enter the organization after graduation, and Sagara and Katagiri are identified as candidates for its next underboss 47.
- Sagara also has an undisclosed relationship with the Society’s young master, Tsukikawa 47.
- Surveillance footage places Sagara inside the Society’s building after Shinnosuke’s group leaves. Kai treats this as evidence that Sagara may be responsible for the subsequent fire and Tsukikawa’s death, rather than as confirmed proof 47 48.
History
Previous Exchange with Aofuji High
Kaikyu loses an off-campus exchange to Aofuji High the year before Shinnosuke’s visit. Inoue Ryushi, Sugihara Kei, and Seki Kiriko represent Aofuji; Seki defeats Kaikyu’s Mikawa 20 22.
By the following exchange, Kaikyu’s previous delinquent boss has reportedly been expelled, and Sagara and Katagiri have taken control 21.
Two-on-Two Rematch
Kaikyu proposes another exchange, requesting two representatives from each school. Eikichi Onizuka brings Shinnosuke Nohara and Seki Kiriko to face Sagara and Katagiri on Kaikyu’s campus 21.
The gymnasium crowd openly threatens the visitors and cheers for Kaikyu’s leaders. While Katagiri fights Seki directly, Sagara attacks Shinnosuke with a stool, spiked knuckledusters, and an iron rod. Kaikyu students surround Onizuka to prevent him from intervening, and the principal disappears during the fighting 22.
Shinnosuke defeats Sagara despite his injuries. After Katagiri leaves Seki unable to continue, Shinnosuke defeats him as well, securing Aofuji’s second documented victory. Kaikyu’s principal leaves without speaking, while students rush to check on their unconscious leaders 23.
Conflict with the Green Leaf Alliance
After Katagiri’s departure, Sagara’s followers attack students from Mitsuhashi and Ito’s school and extort protection money. Shinnosuke and Kai overhear Kaikyu students discussing the proceeds and an impending all-out conflict 47 48.
Shinnosuke and Kai visit Kaikyu to investigate Sagara’s suspected involvement in the Silver Dragon Society fire. They encounter Mitsuhashi, Ito, Imai, and Tanigawa at the gates. The groups form the temporary Green Leaf Alliance, combining the investigation with the effort to recover the stolen money 48.
Sagara orders Kaikyu’s 300 fighters to attack. Shinnosuke activates the Aura Wind Chime, terrifying the crowd and knocking 40 fighters unconscious before exhaustion overtakes him. The remaining fighters regain their nerve when the item’s effect expires, forcing his allies to support him 49 50.
Mitsuhashi reaches Sagara by pretending to be unconscious, using ketchup as fake blood, then knocks him out with a surprise punch. Kaikyu’s students surrender the stolen money and cease resisting. The alliance prepares to take Sagara away and make him confess to the fire; no confession is shown in the provided account 50.