Ding!
A Death-Seeking Mission has been issued!
Mission Name: Join the Demon Slayer Corps!
Mission Content: As a demon, you have chosen to join the Demon Slayer Corps. Surrounded by demon slayers, danger lurks everywhere. Once exposed, you will be ambushed!
This is a long-term mission with no time limit. The higher your position in the Demon Slayer Corps, the richer the rewards. Fortune favors the bold, so go seek death!
Phase One: Successfully join the Demon Slayer Corps and obtain their certification!
Reward: Immune Constitution!
Immune Constitution: Including but not limited to immunity from the following abnormal states: the weakness of demons—sunlight!
...
The voice of the dog system echoed in Kamihara Tetsuya's mind, and he once again greeted its eighteen generations of ancestors.
It actually wanted him, a demon, to join the Demon Slayer Corps.
If he were exposed, wouldn't the Demon Slayer Corps gather all the Pillars to give him a 'warm' welcome?
From the Demon Slayer Corps' perspective, a demon killed Flower Pillar Kanae Kocho, then hid his identity and secretly infiltrated the Demon Slayer Corps. This would undoubtedly be a huge disgrace.
The higher the position, the richer the rewards, they say.
What, you think I'm not dying fast enough, huh?
It would be fine to be an unknown grunt in the Demon Slayer Corps, but the higher his position, the more attention he would attract, and the risk of exposure would increase accordingly.
It's all about the thrill!
But the temptation of this reward was too great; he could finally solve the cursed side effect of 'dying in the light'.
Is this how you test your cadres?
A pleasant scent wafted into his nostrils, and Kamihara Tetsuya slowly opened his eyes, finding himself lying on Kanae Kocho's lap. "How long have I been asleep?"
Kanae Kocho smiled, "Two hours."
Kamihara Tetsuya looked at her deeply. Maintaining that posture for two hours was quite remarkable.
The strength of a demon's constitution was undeniable.
After two hours of rest, days of tension and fatigue vanished without a trace.
Kanae Kocho softly asked, "Is that enough?"
Kamihara Tetsuya's face froze for a moment. Then, he saw Kanae Kocho close her eyes, her body falling backward. He quickly got up and supported Kanae Kocho.
"Hoo! Hoo!"
Upon closer inspection, Kanae Kocho's face was pale, her cherry lips slightly parted, exhaling ragged breaths. A faint sweat beaded on her smooth forehead, and an unusual bloody glow flickered on her skin. Kamihara Tetsuya's hands could feel her rapidly rising body temperature.
"What is this?" Kamihara Tetsuya frowned. Could it be that Kanae Kocho's demonification was not yet complete?
"Hate them, destroy them!"
Kanae Kocho seemed to hear the devil's whisper in her ear. The voice was extremely tempting, amplifying the negative emotions deep within her heart.
The values and ethics she had built over more than a decade seemed on the verge of collapsing.
This impulse threatened to turn her into a man-eating demon.
"It's alright, I won't lose to it!" Kanae Kocho's expression was pained, but her tone was firm.
Her breathing gradually became calm.
There was none of the brutality and ferocity of other demons.
Whenever she was about to lose her sanity.
Kamihara Tetsuya's figure would flash through her mind, and those resentments and hatred would disappear.
Three hours later, Kanae Kocho's complexion became even paler, her originally light purple eyes now tinged with a hint of blood, and she grew the fangs characteristic of demons.
"It seems you're controlling it very well," Kamihara Tetsuya said with emotion. In the original timeline, Kamado Nezuko's demonification led to her direct rampage, almost killing Tanjiro Kamado.
On Kanae Kocho, there was no sign of a rampage, which showed her strong will.
Kanae Kocho smiled slightly. Kamihara Tetsuya had done so much for her; she couldn't disappoint him either.
"Tetsuya, I want to rest for a bit."
A strong wave of drowsiness came over her. Kanae Kocho's eyes drooped, and she could no longer support herself, falling into a deep sleep.
Their positions were swapped. This time, it was Kanae Kocho who used Kamihara Tetsuya's lap as a pillow.
Hoo! Hoo!
The two of them hid in the wooden cabin deep in the mountains. As Kanae Kocho fell asleep, the cabin became silent, with only the sound of the wind blowing through the cracks.
Occasionally, the roars of black bears and fierce tigers would echo through the forest, but only this wooden cabin remained quiet and peaceful.
Kamihara Tetsuya leaned against the wall, eyes closed, contemplating how to join the Demon Slayer Corps.
He had previously refused Kanae Kocho's invitation because the benefits did not outweigh the risks.
Now that the dog system was involved, it was different.
Who could stand dying from a single ray of sunlight?
He absolutely had to get this Immune Constitution!
Kibutsuji Muzan had searched for the blue spider lily for a thousand years without success. It was still unknown whether this thing could truly allow demons to overcome sunlight.
Kamado Nezuko's constitution was an individual anomaly. All in all, the dog system was more reliable.
However, this also led to a vicious cycle.
If he had already overcome sunlight, joining the Demon Slayer Corps would not be difficult.
The problem was that he hadn't overcome sunlight, which made the matter tricky.
He couldn't participate in Demon Slayer Corps activities while exposed to the sun. And constantly acting only at night would easily arouse the Demon Slayer Corps' suspicion.
He could only overcome sunlight by joining the Demon Slayer Corps!
He could only join the Demon Slayer Corps by overcoming sunlight!
Kamihara Tetsuya gritted his teeth. "Dog system, can't you pre-pay the reward?!"
Time passed. After one day and one night, Kanae Kocho, the Pillar-level Swordsman, was completely transformed into a demon.
At the same time, some unexpected situations occurred.
Kanae Kocho needed to sleep, and her sleep time was getting longer and longer. She could only stay awake for one or two hours a day, and this time was still shortening.
"At this rate, I'll fall into a complete slumber in half a month at most," Kanae Kocho said.
The Demon Slayer Corps would capture weaker demons for research, or as training tools for new swordsmen.
But the Demon Slayer Corps' research on demons focused more on how to kill them, such as the wisteria poison demon body experiments.
There was very little research on becoming a demon.
Kanae Kocho also didn't know what was happening to her. She had indeed demonified, but the urge to eat humans, apart from the very beginning, had never appeared again.
"It's possible that you're using sleep to replenish your stamina," Kamihara Tetsuya analyzed.
Kamado Nezuko in the original timeline was also like this.
"If that's the case, it would be great," Kanae Kocho said softly. She also didn't want to eat people.
Suddenly, there was no more topic, and the two fell silent. The wooden cabin was quiet.
Kamihara Tetsuya said, "I want to join the Demon Slayer Corps."
Hearing this, Kanae Kocho's beautiful eyes showed a hint of incredible surprise.
"Don't misunderstand, I'm joining the Demon Slayer Corps only to gain powerful strength, such as the Demon Slayer Corps' Breathing Technique," Kamihara Tetsuya didn't want to give her too much hope.
Kanae Kocho's smile did not diminish. Regardless of the reason, Kamihara Tetsuya's willingness to join the Demon Slayer Corps was enough to make her happy.
"Then I'll teach you the basics of the Breathing Technique."