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--- Chapter 9 ---
Beneath a shady red pine, Kanae taught Tenma the Total Concentration Breathing and Enhanced Recovery Breathing.
She even pulled out a fancy-looking scroll, showing him an internal body parts diagram and how oxygen circulation affects muscles.
Tenma listened to the theory attentively, refreshing his knowledge of the human body. Even though Tenma wasn't a pure human, he can use this knowledge for many things.
Kanae handed the scroll to Tenma, "Here, you can take the scroll. Don't lose it because it's quite expensive."
"Mm." Tenma nodded, planning to test something by himself later.
Kanae smiled because of how obedient Tenme was. She cleared her throat and said, "Ehem, let's proceed to the practical aspect."
"We can start from the Total Concentration Breathing."
"Tenma, breathe for me."
Tenma breathed casually, inhaling and exhaling air from his chest. His body warmed up, which made Kanae nod.
"Good, your lung capacity is more developed than children your age."
"As you grow, it will increase even more."
"But the intensity is not enough. Follow me."
Kanae and Tenma went to another part of the west mountainside, arriving before several vines of calabash plants. Kanae picked one dried calabash, testing its durability by huffing her breath into it.
A few seconds later, the calabash exploded.
"Hmm, this will do."
Kanae picked ten of the best calabash, bringing them to Tenma.
"Your task is to blow these calabashes up with just your breath."
"Try one."
Tenma grabbed a random calabash and breathed in before blowing air into it. Unlike Kanae, Tenma could only crack the calabash.
Crack!
Kanae's eyes widened slightly, 'It's not the cured special gourd we used in the Demon Slayer Corps, but isn't Tenma learning Total Concentration Breathing a bit too fast?'
Although Tenma hasn't fully mastered Total Concentration Breathing, he was close to achieving it.
Still, Kanae quickly regained her calm.
She sternly looked at Tenma, "Continue!"
Crack!
"Again!"
Crack!
"Again!"
Crack!
"Again!!"
Huff! Huff! Huff!
Tenma sprawled on the ground with a sweaty body, breathing as if he had run a marathon. He felt a burning sensation in his throat and weakness all over his body.
"A few more tries and you will master the Total Concentration Breathing today." Kanae shook her head helplessly and carried Tenma on her back downhill, placing him on a river to cool down.
"But let's not get ahead of ourselves and rest for a moment. I don't want you to damage your body accidentally."
...
Tenma wearily leaned on the river's edge and smelled delicious scents from behind. Kanae was roasting river fish for him.
"Tenma-kun, it's time for lunch."
They ate the roasted fish together, but Tenma couldn't help but complain about Kanae's cooking skill and pointed out several flaws in her cooking technique, making the young lady blush in embarrassment.
Yes, God's Tongue is that ruthless.
Well, Kanae is a demon slayer. She's more well-versed in slaying demons than cooking food. As long as Kanae found the food she cooked edible, she wouldn't complain.
"You can do better, Sensei." Tenma finished his complaint.
Kanae's mouth twitched as she pinched Tenma's cheeks playfully, "You shouldn't comment on a girl's cooking like that, Tenma-kun... Or you won't get a girlfriend in the future."
Tenma smugly patted his chest, "Don't worry, Sensei. Since you can't cook, then I will cook for you!"
"As for the girlfriend... You can become my girlfriend!"
Kanae was stunned by Tenma's last remark. What's with this logic? She choked on her fish and looked at him incredulously, "Is that so..."
"Mm, I promise!" Tenma gave her a pinky finger.
Kanae was amused, thinking it was just childish banter. So, she played along and linked her pinky finger with Tenma's, "Then, if you can defeat Sensei in ten years, I'm willingly going to be your girlfriend."
"Hehe, I can even be your wife~!"
"The one who breaks their promise will get their butt spanked a thousand times!" Tenma had a 'wicked' thought when adding this condition.
"Pfft, sure~!" Kanae agreed readily, not knowing she had sealed her own fate.
...
The Training Arc Continues!
After a few more tries, as Kanae said earlier, Tenma finally mastered Total Concentration Breathing. He could shatter the calabash instantly with a single breath.
The next is Enhanced Recovery Breathing.
"You have learned the theory of Enhanced Recovery Breathing but might find it harder in practice," Kanae said calmly.
"Do you know why?"
Tenma pondered and answered based on his own understanding, "The delay of oxygen supply will cause one to suffocate, weakness, losing control over the body."
"Practicing it without supervision might lead to death..."
Kanae was once again surprised by Tenma's unique view. He's not far off from the truth.
She nodded tactfully and replied, "Indeed. Enhanced Recovery Breathing is an advanced technique. Doing it 'incorrectly' would cause heavy injury to your body, even possibly death."
"But don't worry, death would only happen in an extreme scenario."
"Enhanced Recovery Breathing has a limited time frame compared to the Total Concentration Breathing you can do all day."
"There is also a fail-safe method in the Enhanced Recovery Breathing, preventing you from overtaxing your body."
"For demonstration, can you use Gentle Fist on me?" Kanae smiled, asking for Tenma's assistance. After a week, they knew each other well enough to share some knowledge, so Tenma's Gentle Fist is no secret to Kanae.
Kanae found Gentle Fist profound and practical to stun the enemy in close combat. So, she trained some moves herself but has yet to master them.
Tenma executed Gentle Fist and struck Kanae's left arm, making her numb in that area.
Kanae glanced at her weakened left arm and said, "Observe well, Tenma-kun. Take note of the tempo of my breathing, my muscle movement, and how to flow your blood in the desired spot."
Kanae lowered her left arm for Tenma to see, using Enhanced Recovery Breathing slowly.
Unknown to Kanae, Tenma has already activated his Sharingan and made a mental note by remembering her method. He only needs a single look to replicate her breathing tempo and muscle movement to flow blood into the injured spots.
"And done~!" Kanae lifted her left arm, waving it around before pinching Tenma's nose with her hand.
Tenma closed his eyes and deactivated Sharingan.
He digested the information and struck his left arm decisively, stunning Kanae.
"Tenma-kun, what are you doing?"
Tenma ignored Kanae and breathed in, using the Enhanced Recovery Breathing and muscle movement to direct flow into his left arm.
He lifted the pressure point's restriction and exhaled heavily.
"Success!"
"..." Kanae covered her mouth in disbelief.
Is this how it feels to teach a Genius?
'Less than an hour to learn Total Concentration Breathing.'
'And less than ten minutes to learn Enhanced Recovery Breathing.'
'If those old fools at the headquarters knew about this, they might get shocked and enter the grave earlier...' Kanae thought boldly.
Tenma frowned and mumbled, "Not good enough."
Kanae was dumbfounded and laughed out loud, "My adorable student, aren't you reaching too high? You have executed Enhanced Recovery Breathing successfully on your first try, something I have never heard before."
"Don't be too hasty. Slowly accumulate your experience, and you can execute Total Concentration and Enhanced Recovery faster..."
"In fact, we can start the next step of our training," Kanae said after some thought.
"Next step?" Tenma gave her a confused look.
Kanae flicked Tenma's forehead, "We are going to spar while constantly using Total Concentration and Enhanced Recovery, trying to integrate them into your routine."
"I planned to do this in a few months, but your progress changed my mind..."
"Sensei, do you have a problem with something?" Tenma noticed Kanae's troubled look. "You can say it to me."
Kanae shook her head gently, "No, it's fine. It's not that serious."
"Also, kids shouldn't meddle with the problems of adults."
"But you said you weren't an adult a week ago!"
"Ara, have I ever said that?"
"Shameless!"
"Ara, ara~! You shouldn't say that to a lady."
...
...
Ten days later!
Two figures clashed on the shallow creek.
Pak!
Kanae clashed her wooden sword against Tenma's wooden spear, "You have integrated the Total Concentration and Enhanced Recovery Well, Tenma-kun."
"But I still couldn't defeat you, Sensei," Tenma responded with a wry smile. This young lady is more monstrous than she looks.
Kanae giggled, "Are you that eager to defeat me?"
Tenma deeply stared at Kanae, "Because I want you to be my girlfriend!"
CougH!
"Well... Tenma-kun, you're too young for that. Remember, you still have ten years of our bet." Kanae responded with a cough, not expecting Tenma to mention his childish promise.
Tenma pouted, "It's a promise! Not a bet!"
"Same thing, same thing." Kanae brushed him off.
They entered a stalemate, and Kanae decided to push her precious student more on this last day.
Tenma landed on the wet ground with a solemn look and waved his wooden spear, creating a blur.
Kanae lowered her wooden sword and taunted, "Tenma-kun, if you can take this move of mine, I will give you a surprise reward."
"Really?" Tenma felt this was a bait.
"Really, really." Kanae nodded with a faint smile.
"Let's go then."
Tenme crouched and felt a breeze touching his face.
[Spear Breathing - 5th Form...]
[Gin no Kiba!]
(A/N: Silver Fang!)
Swoosh!
Tenma burst forth with extreme speed, even faster than Spear Breathing's 4th Form, Shinkirou, and swung his spear as if he was cleaving with an axe.
Kanae curled her lips and mumbled, "Impressive."
"Total Concentration."
"Sakura Drop Eyes..."
"Flower Breathing - 3rd Form, Hana Matsuri."
(A/N: Flower Festival)
Pale pink and silver light flashed in the air. Although the two lights look illusory, Tenma could sense martial concepts.
Kacha!
'Is this the difference between the standard Demon Slayer World and this world?' Tenma thought, watching his wooden spear snap.
"Looks like it was my victory, eh-!?" Kanae was happy that she was able to stop Tenma's new move.
However, to her surprise, Tenma abruptly grabbed her wooden sword mid-air and shattered it into pieces.
Splash!
Tenma tackled Kanae down to the creek, wetting themselves in the process.
He pressed her fair neck with both hands and declared, "This is my victory!"
"I..." Kanae was speechless.
"Tenma-kun, how cunning of you..."
"But the fight is not over until I get immobilized or say I gave up!"
Kanae used her well-developed body as an advantage and rolled around, putting Tenma beneath her. She also pressed her chest against his face, nearly suffocating him.
"Now, it's my victory." Kanae winked at him.
"You can't move in this situation."
"Shameless..." Tenma couldn't move and mumbled softly, but Kanae could still hear him.
Even though Kanae had developed thick skin, she couldn't help but cough in embarrassment every time Tenma called her out.
She can't help it. This child has such a judgemental gaze.
"Fine, fine, you can still get your reward." She released her grip, allowing Tenma to escape that 'soft' prison.
Before Tenma could react, Kanae pecked his cheek and winked, "There, happy?"
"That's not fair! I don't have time to enjoy it!" Tenma lashed out, feeling betrayed by this reward.
"Pfft, a kid shouldn't be too greedy," Kanae replied cleverly.
"No, that doesn't count! Kiss me again!"
"I dare you! I double dare you!"
Kanae's heart mellowed slightly. "Fine, but you must call me Kanae Nee-sama..."
Tenma gave her a weird look. Does she have that 'royalty' fetish?
Being called sama and chan are two different things. While the latter is an endearment, the former is a sign of respect and reverence.
"K-Kanae Nee-sama, please..."
"Good!" Kanae immediately lowered her lips.
However, she failed to notice a 'wicked' glint in Tenma's eyes.
Tenma swiftly moved and positioned his lips instead of his cheek, making them kiss directly.
Smooch~!
(A/N: Dayum, How lewd~!)
Kanae's eyes widened in utter shock. She quickly backed away, gazing at Tenma with a reddened face.
"Hehe, now that is what I call a victory!" Tenma stood up, basking in the sunlight of happiness.
"Well, it's time to run~!"
"Nigerundayo!!!" He ran away with a trail of dust, fearing being beaten up by Kanae.
"Y-YOU CHEEKY LITTLE BOY! COME BACK HERE!!" Kanae chased after Tenma, wanting to smack his butt out of anger. Yet she didn't realize she was smiling this whole time.
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