Chapter 2: A Perfect Being’s Quest?

Right now, he had to pinpoint exactly where he was in the plot. The last major event was the death of two Upper Moon Six members, Daki and Gyutaro, at the hands of demon slayers.

It was clear he was long past the events of season 2. He also recalled that former Muzan ordered Gyokko to confirm his lead about the Swordsmith Village roughly a month and a half ago.

As per his understanding of the plot, Gyokko took about two months to find and then attack the village with Hentengu.

"So, I have about 15 days before the start of the Swordsmith Village arc, huh?" he muttered to himself, a cold smile creeping across his face.

"This will be a massacre hahahaha." Lost in his twisted dark fantasies,  the main reason Muzan wanted to destroy everything in the Swordsmith village is to severely cripple the Demon Slayer corps.

To combat an organization effectively, a strategic approach involves targeting and eliminating the crucial resources vital for the organization's operations.

In this case, the swordsmith village was a place filled with many swordsmiths. It was also the place where most of the Nichirin swords were made.

He had decided to get rid of the demon slayer corps. Unlike former Muzan, he did not underestimate the current pillar hashiras. 

Also, since there is an existence of a supposed "chosen one" in this world, he had to get rid of him before things became hectic.

Worst case scenario he would isolate himself in the Infinity castle and let them die of their demon slayer mark's curse.

Lost in thought, Muzan was suddenly jolted back to reality by the abrupt change of sight before him.

The space before him twisted and distorted, revealing a floating message in the air:

[Ding! You have been chosen as the host of the Heaven Devouring System. Welcome, Host!]

Looking at the message displayed in front of him, he widened his eyes in shock.

Even though his birth was a result of the merger of a reincarnator with the previous Muzan, the chance of him supposedly awakening a 'system' was beyond his wildest imagination.

"Is this what I think it is? System?"

This changes everything. Thought Muzan. 

He was still unsure if this was an illusion but he quickly discarded that thought. If Makkari could reincarnate in this world then anything is possible.

Making up his mind to investigate this 'system", he began to formulate various conclusions.

One, this might be a trap to become a plaything of a higher entity.

Two, this System was a parasitic existence that needed a host for it to grow in strength.

Third, he had no idea.

Besides, was this system responsible for the arrival of Makkari into the body of Muzan? If yes then why didn't it help  Makkari to outright subdue Muzan's consciousness and make Makkari the new Muzan? 

Why did it wait till he was born because of the merger? He was very suspicious of this system thing.

"System? Can you speak?"

[Answering to the host, the System does not have a consciousness. It gives an appropriate response based on the host's question in a Q&A format.]]

"I see…" 

"Were you responsible for Makkari's arrival to this world? Why did you not help him take over Muzan's body? Why wait for my birth?" He finally decided to ask the question that was bugging him the most.

[Yes, the system was indeed responsible, but Makkari was not the chosen host, you are.]

He narrowed his eyes at the system's response. The system was not telling him the whole truth. It was hiding something.

He decided to continue his integration with the system.

"What can you do? What functions do you have? Do I need to do quests or something?"

Given that the name of this system was the Heaven Devouring System, he had no idea what he was supposed to do.

Did he have to go up against the gods or something? But this world didn't have gods…or so he thought?

[Right now most of the functions are locked. You must complete the first quest to increase your authority to access the system. ]

"Quest? What if I don't want to do it? " Muzan already had a rough idea about the quest function. If he finished the quest, as a reward, he would gain access to core functions of the system.

There was no free food in this world. He understood that the system wanted him to do something, and only after completing the quest would he get rewarded.

But if he accepted the quest, naturally he would also have to face a penalty right? What if he refused to do it? Would the system force him to take it?

He hated even the thought of becoming a plaything of a higher existence. It disgusted and angered him to no end.

How dare someone play with his life? 

[Finishing the first quest is essential for your growth. The system is capable of making you the apex predator of whatever world you are in. If you deny it, you will also lose the opportunity to travel to different worlds. Are you willing to give up such an opportunity?]

Comprehending the system's words, he felt like a frog trapped in a deep well, unable to escape without outside help—in this case, the system.

If the system has the power to let him travel to different worlds, how can he ever let go of such opportunities?

Countless worlds to plunder, countless divine milfs to conquer, just the thought made him so excited that he got an erection.

"Tell me about the quest system." He continued.

[Ding! First Quest triggered!]

[Quest: The One Who Thinks He's Perfect

Objective:

Look who it is, the Demon King who can't even handle a little sunlight. Your enemies are laughing at you, calling you a coward despite your so-called power. Time to prove you're not just all talk. You need to:

- Obliterate the Demon Slayer Corps (if you can)

- Defeat all Pillar Hashiras and make sure they can't ever fight back (without breaking a sweat, right?)

- Conquer your biggest weakness: the sun (good luck with that)

Time limit: 2 months (starting today)

Rewards:

System Rank Up: Unlock all basic functions of the system and get the answers you seek. Other parts of the reward will be revealed upon quest completion (if you make it).]

"…" Why did he feel like the system was mocking him the more he read the quest?

Ignoring the mockery, his thoughts shifted to the objective.

The objectives of the quest were the main goals the previous Muzan had. But he had a limited time frame to complete the quest.

The most difficult thing was conquering the sun. Now that he knew the truth about the Blue Spider Lily, it would make things easier but finding it within this timeframe was nearly impossible.

'Nezuko is really my golden ticket huh…' Muzan thought with a smile spreading through his face.

"I accept the quest." 

[The two-month timer has started. The system wishes the host the best of luck!]

***

At the mountain's peak, surrounded by wisteria, stood a traditional Japanese mansion. A wooden veranda wrapped around it, leading to a Zen garden with white gravel, bonsai, stone lanterns, and a pond with large stones.

Inside one of the mansion's rooms, a man in his twenties abruptly sprang up from his futon. His once partially rotted face now bore the full weight of the curse, leaving him barely able to see the light.

"W-What was that vision? Muzan Kibutsuji... conquered the sun?" he exclaimed in horror.