[......] = Time skip
Another day had passed, and everything unfolded as expected. Kiba distanced himself from the Gremory Clan to focus on his revenge. Concerned for Kiba, Issei, along with Koneko, decided to help and roped Saji into their plan. They sought out Xenovia and Irina to form a temporary alliance to destroy the Excaliburs, which the girls accepted due to the low chance of success otherwise.
Issei and Koneko decided to find the person they believed could help most with their plan. They spotted that person in the park, reading manga under a tree, carefree.
**Issei**: Akuro! *He called, making Akuro pause his reading.*
**Akuro**: Huh? What are you guys doing here?
**Issei**: Well… *He said, getting nervous, recalling Akuro's odd behavior yesterday.*
Akuro narrowed his eyes, looking at them questioningly.
**Akuro**: Let me rephrase: what do you want? *He asked coldly, sitting up on the grass.*
**Issei**: It's just that… *He grew more nervous from Akuro's tone.*
Akuro waited for a response, though he already knew why they were there.
Seeing Issei's hesitation, Koneko spoke up.
**Koneko**: Akuro-senpai, we need your help with a plan to help Kiba.
**Akuro**: Kiba? *He asked, his face twisting again.*
**Koneko**: Yes. *She said firmly.*
**Akuro**: No offense, but I'm not helping. Not while he's like this… *He said, frowning and lying back on the grass.*
**Issei**: What? Why? *He asked, confused by Akuro's refusal.*
**Akuro**: I already said, the way he is now, there's no helping him. *He said, resuming his manga.*
**Issei**: You really don't care about him? *He asked, incredulous.*
Akuro didn't respond, just kept reading. Then something happened…
**Koneko**: PLEASE! *She said, kneeling and bowing her head to the ground toward Akuro.*
**Issei**: Koneko-chan…
**Koneko**: Issei-senpai, why aren't you bowing? We're asking for help, and Akuro-senpai is our ally. He has no obligation to help us; this is all we can do. *She said, head still bowed.*
**Issei**: Y-You're right, Koneko-chan. *He said, kneeling and bowing as well.*
**Issei and Koneko**: PLEASE! *They pleaded again.*
Akuro suddenly stopped reading, closed his manga, stood up, and walked past them. Their eyes widened, still bowing, thinking he wouldn't help. Akuro was now behind them.
**Issei (Thinking)**: *So he really won't…* *He thought, believing Akuro wouldn't assist.*
But then…
**Akuro**: How long are you gonna stay there? We don't have much time, so let's move. *He said, turning to face them.*
Their shocked expressions turned into smiles.
**Issei**: Ha, you scared me! I thought you really weren't gonna help. *He said, sighing in relief.*
**Koneko**: I knew Akuro-senpai wouldn't refuse. *She said with a smile and slightly flushed cheeks.*
**Akuro**: If I didn't help friends bowing to me, I'd be a monster. *He said, scratching his neck awkwardly.*
**Akuro**: So, what's this plan? *He asked, already knowing the answer.*
.......
They met with the others involved—Xenovia, Irina, and Saji. Xenovia, seeing Akuro, felt a chill, recalling their fight—or rather, massacre. Though they weren't fighting now, she couldn't stop trembling. Irina was also wary, given Akuro's devastation of Xenovia. They decided to find the final person for the plan: Kiba.
.......
**Kiba**: I see. But honestly, it's risky to destroy Excalibur alongside others who wield it. *He said after hearing the plan.*
**Xenovia**: You're quite suspicious. Didn't you leave the Gremory Clan?
**Kiba**: Hmph… *He let out an irritated sound, frowning.*
**Xenovia**: If you're on your own, there's no issue discarding you here. *She said, frowning and slightly drawing her sword.*
**Kiba**: I suppose you could think that. *He said, forming a magic circle in his hand to summon his swords.*
As the two were about to clash, the only person with enough power to stop them intervened…
**Akuro**: *Cough… Cough…* *He faked a cough to get their attention.*
Xenovia, realizing Akuro was there and what she was doing, began trembling.
*Flashback*
**Akuro**: "If you act arrogantly in front of me again or hurt my friends, I *will* kill you."
*End Flashback*
**Xenovia (Thinking)**: *Damn. I almost did both things he warned me not to.* *She thought, recalling his threat.*
She sheathed her sword, still trembling slightly.
**Xenovia**: Since we share a goal, now's not the time for pointless fights. *She said, sweating coldly.*
Seeing Xenovia stand down, Kiba dissipated his magic circle. Xenovia and Irina revealed that Valper Galilei, the man who experimented on Kiba and his friends, causing their deaths, was behind the Excalibur theft, with Freed as his subordinate. Kiba agreed to join the plan upon learning Valper's involvement, but…
**Kiba**: Guys! *He called their attention.*
**Kiba**: Don't interfere. This is personal, my revenge. I don't want to drag you into it.
The only sound was footsteps, which stopped, followed by a punch. Kiba had just been punched in the face by Akuro.
**Kiba**: Huh?
**Akuro**: "Don't want to drag you into it"? Screw that! Aren't we your comrades? Why don't you trust us? Why carry the burden of this revenge alone? Why push us away? *He said, frowning, staring at Kiba.*
**Kiba**: What are you… *He said, shocked, touching where he'd been hit.*
**Akuro**: Like I said that day, you're pathetic, trying to handle this revenge alone, carrying this burden, and pushing us away bit by bit. So tell me, can you really not trust us?
**Kiba**: Then what do you want me to do? *He shouted, irritated.*
**Akuro**: RISK OUR LIVES WITH YOURS! AREN'T WE YOUR COMRADES?! *He shouted louder.*
Kiba was speechless; he never imagined someone would say that to him.
**Kiba**: I… *He said, unsure.*
**Issei**: Think we'd abandon an important comrade? Not just me or Akuro—the President and everyone are hurting. *He said, hands on Kiba's shoulders.*
**Issei**: You okay with that?
Kiba felt his shirt grabbed and saw Koneko.
**Kiba**: Hm?
**Koneko**: I'll help too.
**Kiba**: Koneko-chan?
**Koneko**: It'll be lonely if Yuuto-senpai disappears.
Kiba stared at her, stunned, before a faint smile appeared.
**Kiba**: I give up. If even Koneko-chan says that… I can't do this madness alone. *He said, smiling weakly.*
**Issei**: So… *He said, smiling excitedly.*
**Kiba**: We know the real enemy. I'm counting on everyone's help. *He said, smiling.*
**Everyone (except Akuro)**: Yesss! *They shouted, thrilled Kiba accepted their help.*
While they talked, Kiba noticed Akuro standing apart, facing away. He approached.
**Kiba**: Akuro. *He called, with Akuro still facing away.*
Akuro didn't respond or turn.
**Kiba**: I want to thank you. You opened my eyes and stopped me from a path that would only push away everyone important to me, leaving me with the emptiness of loneliness after revenge. So, truly, "Thank you." *He said, bowing slightly.*
Akuro raised his hand, signaling Kiba to step forward. When Kiba stood beside him, Akuro extended a closed fist.
**Kiba**: Huh? This…
Kiba bumped Akuro's fist with his own—a simple gesture, but they understood each other perfectly. A slight smile appeared on both their faces.
Watching from afar:
**Issei**: Looks like our swordsman duo is back on good terms. *He said, smiling.*
That night, after discussing the plan, everyone left to prepare. While Issei and the others executed the plan at night, Akuro didn't join. Instead, he was at a port where a man was fishing—Azazel, whom Issei had been encountering. Akuro floated in the sky, observing as usual. Even as a high-ranking fallen angel, Azazel was nothing to Akuro and couldn't sense him. Akuro was watching because Azazel was talking with one of the world's strongest beings, a boy with white hair, a black jacket, a green shirt, and red pants—the "White Dragon Emperor."
Their conversation was casual: Azazel ordered him to kill Kokabiel if Rias's peerage couldn't handle him, wanting to test Issei's limits by pitting him against a cadre-class fallen angel.
After listening, Akuro teleported home. The next day at school, he learned the plan failed—Freed and Valper escaped, with Kiba, Xenovia, and Irina in pursuit, still missing. Issei had received a thousand spanks and could barely sit, making Akuro cry with laughter at his waddling.
In the clubroom, Rias's familiar reported finding Irina in a forest. Rias's peerage used a magic circle to reach the location, while Akuro placed two fingers on his forehead and used "Instant Transmission" to arrive. They found an injured, unconscious Irina on the ground.
They quickly tended to her, and Akuro used his power to heal her, his hand glowing with a green aura—his "Medical Ninjutsu." As he healed Irina, a magic circle appeared, and Sona, Tsubaki, and Saji emerged.
Sona suggested taking Irina to her residence. Tsubaki and Akuro went via magic circle, with Akuro continuing to heal her.
After they left, Freed appeared, revealing he wasn't alone but with Kokabiel, a cadre-class fallen angel. Kokabiel announced his plan to restart the Holy War between factions and headed to Kuoh Academy to execute it. Rias, her peerage, Sona, and Saji followed to stop him.
.......
At Kuoh Academy, Sona and her peerage were erecting a barrier to protect outsiders, as they were about to face a high-level fallen angel. Soon, Tsubaki returned via magic circle. Issei asked about Irina, and she said Irina was stable, with Akuro staying to fully heal her, which is why he hadn't returned.
The rest unfolded like the anime: they struggled against Kokabiel, with Xenovia and Kiba reappearing. Xenovia aided in combat, while Kiba fought Valper to avenge his friends.
Exhausted from using their magic, Rias and Akeno were on the ground. Seeing an opening, Kokabiel launched a massive, powerful light spear at them. Too drained to defend or escape, they braced for impact.
**Issei**: PRESIDENT, AKENO!!! *He shouted as the spear neared.*
Both closed their eyes, awaiting their fate, but instead of being struck, they heard a repulsing sound. Opening their eyes, they saw the spear stopped inches from hitting them.
**Akeno**: What…
**Rias**: It's him! *She said, finishing Akeno's thought.*
Suddenly, a massive pressure engulfed the school, felt even by Sona's peerage outside the barrier. Everyone trembled, their bodies forced downward, though most managed to stay standing or, in Kokabiel's case, flying, due to above-average strength.
Rias's peerage, feeling the pressure, looked back and saw a portal with someone slowly emerging.
**???**: Man, I leave for a few minutes, and you make a mess. *He said, stepping out, revealing himself.*
**Asia**: Akuro-san! *She said, smiling.*
**Rias and Akeno**: Akuro! *They said, smiling happily.*
**Issei**: Haha, finally, he's here! *He said, grinning while dodging light spears, still in battle.*
**Xenovia**: Huh? That guy again. *She said, glancing at him with a chill, slicing a light spear.*
**Koneko**: Now that Akuro-senpai's here, we can fight without worry. *She said, smiling with a slight blush.*
**Kiba**: There he is. I was wondering what happened. *He said, smiling, seeing his friend enter the battlefield, charging at Valper again.*
Akuro's left eye was now purple—the "Supreme Rinnegan." He'd used its gravity power to stop the light spear and its Space-Time Ninjutsu to open a portal to the battlefield. The earlier pressure was his "Spiritual Pressure" from Bleach, used to announce his presence, and it worked—Kokabiel hadn't taken his eyes off him since he appeared.
**Akuro**: So, who do I need to smash? *He said, staring at Kokabiel provocatively, already knowing the answer.*
**To be continued…**