Crossover Anime: Starting with Bankai from Demon Slayer

Chapter 160 Letting the Wolf In

Upon hearing the word "breathing," Hinai and Hinata paused slightly.

This, of course, did not escape Aizen's notice.

"Aizen-sensei," Hinai looked up curiously, "why is what you teach us completely different from the breathing techniques Shinobu teaches us?"

"Shinobu-neechan said that you have to breathe air into every corner of your lungs and make your blood boil," Nika added. "I remember that's how the samurai in my past life fought."

Aizen smiled slightly: "I think the Breathing Techniques that the Sixth Seat of the Butterfly Clan excel at are for pushing the body to its limits; while the Spirit Pressure that the Spiritual Arts Academy teaches you is for communicating with the depths of the soul."

"However, I'm very curious... what kind of place is that world you're talking about that uses breathing?"

"I once heard Butterfly Sixth Seat mention that you seemed to have gone through a long and arduous journey to get here."

Aizen asked his question in an extremely natural manner, as if it were just a casual chat between a teacher and student.

He used his almost flawless affability to slowly unlock the doors to the memories of these two children.

In fact, ever since he retrieved that fragmented piece of spiritual pressure from Asuka, the longing for another world had spread through his heart like a poison.

That was a world that had broken free from the Soul Society's spiritual particle cycle and possessed its own independent rules.

How can anyone not care? How exactly can we get there?

And the two little girls in front of me, and that Shinobu Kocho... they all came from that world.

This made Aizen increasingly unable to control himself, and he even began to frequently appear in situations involving these people, which was not so composed.

He knew that this deliberate approach might be noticed by others, but he really couldn't help himself.

As a result, he hadn't checked on Tosen's progress on things like the etherealization experiment for many days.

"The journey... I really don't remember much about it. I only remember that day..." Nika's expression turned somewhat grim, which caught Aizen's attention.

"What happened that day?" His fingers tapped lightly on the table, the sound seeming to guide some kind of frequency.

Hinai, supporting Hinata's shoulder, frowned and smiled, "Aizen-sensei, let me speak for Hinata."

"Our house caught fire that day, and it swallowed us up... After enduring extreme pain, I woke up here..."

"A big fire? I'm so sorry to have reminded you of unpleasant memories." Aizen quickly patted Nika's head apologetically. "But I still want to ask, what exactly happened? Didn't you encounter any Shinigami guiding your souls back then? Didn't you experience a Soul Burial?"

His problems have clearly gone beyond the scope of academic tutoring.

The two children fell silent, and their spiritual pressure began to fluctuate erratically.

This indicates that they are touching upon certain taboos deep within the soul.

Just then, a light footstep came from the corridor.

"Captain Aizen, I'm so sorry to have kept you up for so long with today's tutoring session. I'm here to take them home."

With a gentle yet slightly cold voice, a woman dressed in a Shinigami uniform and with a Zanpakuto at her waist walked in.

Shinobu Kocho, the sixth seat of the fourth division.

Aizen showed no displeasure at being interrupted. He stood up and nodded slightly to Shinobu Kocho.

"Six seats for the Butterfly Clan, you've come at the perfect time."

"Hina and Hinata's progress is astonishing. Even among the top students at the Shinigami Academy, it's hard to find such talent. I think this is inseparable from their family tradition of learning, so I chatted with them for a bit longer."

Shinobu Kocho walked over to the two children and patted their heads: "It's all thanks to Captain Aizen's excellent teaching. In Seireitei, who doesn't know that Captain Aizen is the most popular mentor among the students?"

"However, they are still young, and their bodies will not be able to handle such high-intensity theoretical classes for a long time."

"You're right, it was my oversight." Aizen smiled slightly, his harmless appearance making it impossible for anyone to suspect anything.

Hinai tugged at Shinobu's sleeve and turned to look at Aizen.

"Aizen-sensei, you asked so many questions about our family... If you don't mind, would you like to come to our house for a meal? I'll have my father answer your questions."

Rixiang nodded in agreement: "Yes! Father and Mother will be very happy, and Brother Xingming will be there too. Although he doesn't talk much, his vegetarian meals are delicious."

Shinobu Kocho frowned, looking at the two children with a hint of annoyance: "You two! Captain Aizen is very busy."

"Captain Aizen, I'm so sorry, the children were a bit rude."

Shinobu had already troubled Captain Aizen with Asuka's matter, and these past few days she'd been watching him give the two kids extra lessons. If this continued, Shinobu wouldn't know how to repay this kindness.

Aizen smiled and said, "It's alright. If the Sixth Seat of the Butterfly Clan finds it inconvenient, I can visit another day to express my regards."

"How could it be inconvenient?" Shinobu Kocho bowed repeatedly. "It is our honor that Captain Aizen would deign to visit our humble abode. Lord Aizen would be very pleased to know that such a distinguished guest as you has visited us."

My lord... Aizen's eyes narrowed imperceptibly.

"In that case, I shall respectfully comply."

As dusk fell, the afterglow of the sunset painted the dirt roads of Rukongai a vibrant orange-red.

Aizen removed his shihaka robes and changed into simple casual clothes, making him look more like a refined scholar on a field trip to the countryside.

He walked beside Shinobu Kocho, slowly making his way through the bustling Rukongai.

"Life here must be very different from the world you lived in before, right?" Aizen said casually as he walked around, taking in his surroundings.

The wandering spirits do not come from the same time; some of the spirits here are from the modern era, while others can even be traced back a thousand years.

Therefore, the topic of past lives is often a common opening line for wandering spirits to exchange pleasantries.

"Yes, I feel a greater sense of desolation here compared to the Ubuyashiki Mansion and the Choya Mansion," Shinobu Kocho replied softly.

She maintained a polite distance from Aizen, always using respectful language.

"However, being with family is the same no matter where you are."

"Family...it's such a warm word," Aizen remarked.

Unfortunately, the mighty Grim Reaper is always alone.

Soon, the group arrived at a small courtyard located in a corner of South Rukongai.

Behind the courtyard, a tall figure was sweeping fallen leaves.

"Brother Xingming, we've brought our guests back!" Rixiang shouted.

Hearing the child's call, Himejima Gyomei slowly turned around, placed the broom on the wall, and clasped his hands together.

"...Namo." Xingming murmured, his tone calm: "Welcome to this humble abode, distinguished guest of the Spirit Court."

They already knew that Captain Aizen was coming from Hinai, who had returned early.

Aizen felt a slight tremor in his heart the moment he saw Gyomei.

He had never seen this man on the list of students at the True Central Spiritual Arts Academy, but the man seemed to possess extraordinary spiritual power naturally.

Is this also an effect of crossing boundaries?

"Mr. Himejima, I apologize for disturbing you." Aizen politely returned the greeting: "I heard from Miss Butterfly that you maintain your devout training every day even in Rukongai. Seeing you today, I can see that you are indeed extraordinary."

Xingming's bright eyes held a smile as he calmly replied, "You flatter me. Please follow me inside."

Upon entering the room, one is greeted by a faint aroma of herbs mingled with the scent of tea.

Kagaya Ubuyashiki was sitting in the main seat.

He wore a deep purple kimono, exuding an ethereal aura. Even just sitting quietly, he possessed an undeniable leadership quality.

"Lord Aizen." Kagaya and Amane stood up and bowed slightly, their voices as gentle as a spring breeze, instantly bridging the distance between them: "It is truly an honor for the Ubuyashiki family to meet you here."

"My two children have made great progress under your guidance these days, and as their father, I am extremely grateful."

"Mr. Ubuyashiki, you're too kind. In this world filled with chaos and strife, seeing pure souls like yours is a cleansing experience for me."

Aizen accepted the tea offered by Lady Amane, his tone so sincere that no one could doubt him.

He sat down in the guest seat, his gaze lingering on Kagaya's face for a moment.

Is this the man who could make countless powerful people willingly die?

Could he possess fragments of the Spirit King?

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