Reincarnation as Lower Rank Five in Demon Slayer

In the Infinite Castle of another dimension, Muzan stood on a large wooden platform, looking at the kneeling Upper Moon Six, Gyutaro and Daki, while Li Lei stood expressionless but inwardly eager to watch the show.

"Gyutaro, Daki, there's nothing more for you to do now. You can leave."

After Muzan finished disciplining Upper Moon Six, he immediately began to ruthlessly kick him out.

"Yes, my lord."

“Dahime, Gyutaro understands.”

"boom--"

As Nakime's koto music began, Gyutaro and Daki vanished from their spots in an instant.

Oh, they're leaving already? I thought there was something interesting to see.

The sudden departure of Gyutaro and Daki left Li Lei somewhat disappointed.

"You're tired. Your fight just now was very good. You lived up to my expectations. Now it's time to reward you."

Muzan turned around and said to Li Lei.

"Thank you for your kindness, Lord Muzan. I am already very satisfied to receive your praise."

Muzan's praise of Rui was the greatest reward for Rui.

Upon receiving Muzan's praise, Li Lei appeared overjoyed, as if the reward itself was not his goal, but Muzan's praise was what he truly desired.

Upon hearing Li Lei's words, Muzan's lips curled up slightly, clearly pleased with what Li Lei had to say.

"What an adorable child! Here, have some more of my blood!"

As he spoke, Muzan took out a bowl that he had prepared, containing his own blood, added some more of his own blood, and handed it to Li Lei.

"Tired? Let's become stronger!"

The Upper Moon hasn't changed in a long time. Let's see how far you can go in the Upper Moon series, Rui.

Muzan looked at Li Lei with great anticipation, eager to know what Li Lei's future would hold, after all, he was the most talented demon besides himself.

The last one, Doma, who had a great talent for being a demon, has now reached Upper Moon Two, but I don't really like his personality. As for Rui, he has a great talent for being a demon, and his experiences suit my taste perfectly, so it's hard not to like him.

"Thank you, sir. I will definitely work harder to become stronger and meet your requirements."

Li Lei took the bowl containing Muzan's blood, his eyes resolute, and said with conviction, before drinking the blood in one gulp.

A powerful force coursed through Li Lei's body, his heart began to pound violently, and Li Lei's overall strength increased once again, making his aura even more terrifying.

"Clap clap clap..."

"Not bad, not bad. You really are a natural-born ghost. No matter how much blood I give you, you can adapt very quickly."

Muzan kept clapping and praising, and even had a terrifying thought in his mind: if he kept feeding Rui his blood, Rui might evolve into a second Demon King.

Muzan insisted on the principle of "trying it or die," so he suppressed his curiosity and didn't conduct the experiment, since one Demon King was enough.

"Lord Muzan, Rui has a plan to overcome sunlight, but I don't know if I should tell you."

"Oh—tell me about it."

Upon hearing the idea of ​​overcoming the sunlight, Muzan instantly perked up.

"It's like this, Lord Muzan, my idea is to use the Nichirin Blade that contains solar energy..."

After a long period of repeated adaptation, I've managed to overcome the sunlight, but it's taking quite a while, and I don't know if I'll succeed.

"Sir, do you think this method is feasible?"

Li Lei revealed most of his thoughts, but kept some to himself, since he wasn't truly helping Muzan overcome sunlight.

"You don't need to mention how tiring it is. Your method of using solar energy to overcome sunlight by inserting Nichirin Blades all over your body won't work."

This method doesn't need to be mentioned again.

Muzan's tone suddenly turned cold, as if he had remembered something unpleasant.

The fact is that after hearing Li Lei's thoughts, Muzan recalled events from hundreds of years ago.

Muzan frowned, the scene from that day still vivid in his mind.

“That monster Yoriichi Tsugikuni, the knife wound he left on himself hundreds of years ago has not healed to this day. This is completely contrary to the common sense of the world. He is the real monster.”

Thinking of this, Muzan's power instantly overflowed, destroying the surrounding environment, and the floor was torn apart under the influence of this invisible force.

Li Lei, standing to the side, suddenly felt as if two mountains were pressing down on his shoulders, making it difficult to even breathe.

"Is this the power of Demon King Muzan? Apart from Yoriichi Tsugikuni, he is the strongest progenitor of demons in Demon Slayer, the origin of all evil demons."

The sheer power emanating from his anger is terrifying; how did Yoriichi manage to defeat him so easily back then? It seems unbelievable!

At this point, Li Lei also began to doubt whether Yoriichi Tsugikuni was even human.

"I'm tired, I'm leaving now. You can explore the Infinite City on your own."

Muzan withdrew the power he had been emitting, said a few words to Li Lei casually, and then turned and left.

Seeing Muzan leave, Li Lei's desire for power intensified.

"I will definitely have this powerful strength in the future, and it will be even stronger."

Li Lei secretly made a vow.

Muzan never imagined that his unintentional exposure of his power would have such a profound impact on him.

The power that the Demon King Muzan unintentionally revealed startled Li Lei, but it also strengthened Li Lei's desire to become stronger.

Looking up at the empty Infinite City, I couldn't help but feel a pang of emotion. How wonderful it would be if this place were my own.