5 years passed by.
Within these years, Dawn City went from a restricted zone occupied by a Demon Sage to a popular trade spot.
Its population increased from the initial 900 to almost 2000 people.
Due to Sukuna's demon identity, not many people were willing to shift to his city even though it offered great prospects.
The 2000 people mainly consisted of refugees or people who had lost their homes due to some natural disaster or a monster attack.
As the population increased, Sukuna created a registrar department to note down the information of all residents as well as offer them a citizenship document.
He trained 300 guards for the city's protection and equipped them with the best weapons and armour he had acquired after beating the Royal Capital's army.
The total number of apprentice mages increased from the initial 20 to almost 70.
After five years of learning, almost 50 of them had become full-fledged mages who could expertly use the hexagonal magic shield, Zoltraak for attack, as well as some more convenient magic, plus a magic of their own which they had personally developed.
They now acted as researchers and teachers inside Dawn Magic Academy, helping him and Solitar further their magic research.
And one of the fruits of their research was a flying spell for humans.
When it was first introduced, Solitar rejected it almost instantly.
"Flying is something only demons should be capable of."
"Demon Solitar, you of all demons should know it is only a matter of time before humans develop their own flying magic...."
After he explained it to her, she fell silent, then agreed.
And so four years ago, they managed to develop a flying spell for humans.
It has become one of the spells taught before any other inside Dawn Magic Academy.
----
Inside Sukuna's castle.
Erde held a letter from the Royal Capital in her hand and read its content aloud.
"....we wish to establish friendly ties with Dawn City and forget any past grievances...."
She read in a calm tone as her eyes kept glancing at Solitar, who was sitting on Sukuna's lap, caressing his face with her hand.
"....we will be sending a representative in the upcoming days....."
As she finished speaking, Erde calmly closed the letter before turning around and taking her leave.
And as soon as she was gone, Solitar stopped caressing Sukuna's face and got up from his lap.
Sukuna, feeling a sense of loss, asked her,
"What's wrong with you?"
Solitar looked at the closed door before saying,
"My assumption was correct after all."
She turned towards the confused Sukuna before continuing,
"Human Mage Erde has fallen in love with you."
"?"
"She has selected you as a suitable partner and wants to conceive children with you."
"..."
"Even though she is from a different species, she harbours such a thought. Humans are truly foolish."
Sukuna rubbed his forehead and asked her,
"Is that why you were suddenly sitting on my lap and acting affectionately?"
"It was the most effective way to confirm her feelings. Humans are simple like that."
"Oh..."
Sukuna rubbed his chin, then thought for a moment before asking,
"So you're sure she likes me?"
"Yes, without a doubt."
"Then... do you think she'll let me touch her chest if I ask?"
Now it was Solitar's turn to be confused.
Why would a demon want to touch a human female's chest?
"We demons are born naturally in nature. We do not need to perform intercourse like humans to give birth to new life....."
She continued speaking without stopping.
"The reason our bodies resemble humans is simply to deceive them. We do not possess the internal structure that their kind has, only the external parts."
She lowered her hand and touched her nether region, which had the outer parts of a human woman but no internal organs that could be used to carry children.
"Which means to us, it is a meaningless endeavour."
Sukuna listened to her words with a serious look on his face, then asked the important question,
"So, will she let me touch her chest?"
Solitar fell into great doubt and answered in a slow voice,
"....yes, she will."
"Hm....."
Sukuna slightly narrowed his eyes, and then just as he was about to get up from his chair, Solitar suddenly stood before him and started stripping.
Without hesitation, she took off her shirt, revealing clear, smooth skin and medium-sized breasts.
"...what are you doing?" Sukuna asked, staring at her in shock.
"It is hard to comprehend, but you seem to be able to feel emotions, unlike a demon..."
The doubt in her heart cleared, and her usual smile suddenly widened even more.
"The experiment you are doing seems to be showing success, Sukuna."
"...what does that have to do with you removing your clothes?"
"It is simply the fastest way to confirm....."
She muttered, and then, without any warning, grabbed Sukuna's hand and pressed it against her chest.
With a calm smile on her face, she pushed his hand inwards, deforming her chest, making him feel her soft and warm skin along with the pink nipple poking his palm.
Sukuna's eyes widened unconsciously as he slightly clenched his hand to get a better feel, making his heart beat faster.
Solitar held his wrist and instantly noticed the change in his pulse.
"It is confirmed."
She let go of Sukuna's hand, placed her arms around his neck, and looked him straight in the eye before saying.
"Unbelievable... you truly have started... to 'feel' like humans."
Her breath pressed against his face as she continued.
"Fascinating... you are... you truly are fascinating, Sukuna...."
She kept muttering in a dazed tone.
"Better than the demon king... and Demon Sage Macht..."
"As your magic research partner... won't you help me understand too?..."
Her lips came so close, almost touching his own.
"... please? Sukuna—"
Before she could continue, Sukuna's lips connected with her own.
A hand came from the back and grabbed her head, while the other hand held her waist and pulled her close.
Solitar lay silently in Sukuna's arms, her eyes calm as a tongue invaded her mouth and a hand slid under her dress, groping her butt.
Her soft breasts completely pressed against his chest while his hand traced down the crevice of her butt and came before a hole that resembles a human woman.
His finger peeked inside and explored the area as he released her lips to take in a deep breath.
Solitar stared at his slightly red face and asked.
"Will this help me understand?"
"Maybe."
"I see."
She nodded, then leaned forward and kissed him, following the example of human women she had seen before.
Sukuna felt a sense of excitement fill his body.
Holding her waist, he got up and took her to the table before placing her ass down on it.
Then he pulled down his pants, revealing the true spear of Heaven.
Seeing that Solitar kept kissing, he grabbed her teal-colored hair and forcefully pulled her back.
Then he pushed her down on the table, making her breasts giggle and shake as he grabbed her pants and pulled them down, taking them off from her fair legs, completely revealing the wonderful crevice on her lower body.
Solitar looked at his spear and understood his intention.
Lowering her hand, she grabbed the ends of her pussy before spreading it open, revealing the pink interior.
"Is this the goal?"
Sukuna touched the opening with the shaft of his spear, examining the fleshy warm surface before slowly pushing it inside.
As the feeling of flesh surrounded his spear, he pushed it all the way inside, making Solitar narrow her eyes in slight pain.
Even her pussy was built just like a human woman's, just to better deceive them.
Staying like this for a moment, completely enjoying the feeling of her inside, Sukuna slowly pulled out before thrusting inside, making her fair body before him giggle with vibration.
*Thrust*Thrust*Thrust*
A rhythmic sound rebounded throughout the room as Sukuna continued pounding carnal desire foreign to a demon onto the silent Solitar.
Her chest moved up and down; the two medium peaks appeared enchanting.
Even as she was being pegged, Solitar kept trying to understand human emotions like Sukuna.
He turned her over, lifted her up, and made her raise her hips like a dog and even had her ride hip from the top.
Yet even after all of that, she couldn't find the 'feeling' she was looking for.
After a session that went on for an entire day, Sukuna and Solitar took a bath before going to bed.
Sukuna held the naked Solitar in his arms, silently enjoying the warmth of her soft body as Solitar kept speaking.
"Will this truly work?"
"I think so."
"Is this how you understood humans?"
"Well, it took me about a century of effort....."
"A century? That's not long. I see if I follow this for a century, living like humans, I will too be able to understand these emotions like you."
"...maybe."
Sukuna muttered in a silent tone while groping her chest and playing with her nipples.
"Help me Sukuna, help me understand what I always thought to be an impossibility."
Solitar said as she turned her head and kissed him like a human.
----
Next day.
Some unwelcome guests from afar approached Dawn City.
A tall demon with a monstrous face.
Elder Sage of Corruption, Qual.
A magenta-haired female demon, with two long brown horns on her head, carrying a scale of balance in her left hand.
Demon Sage of Destruction, Aura of the Guillotine.
A demon wearing a helmet covering his entire head with large pauldrons, with a flower motif decorating them.
Demon Sage of Destruction, Böse the Immortal.
A long red-haired demon with two cursed horns coming out of his forehead.
Demon Sage of Destruction, Macht of the Golden Land.
And finally.....
A hooded demon with two long, bulky horns coming out of his forehead.
The Demon King's Confidant, Schlacht the Omniscient.
Macht, who had remained silent throughout the journey, opened his mouth and asked,
"Is it necessary for all of us to go together just to meet a new demon?"
His question was aimed at the one who had brought them here.
Schlacht looked at the castle in the distance, then replied without turning his head,
"If we brought any fewer, then we wouldn't walk out of here alive."
His words made all the great demons pause and silently look at the castle in the distance.
Just how strong could he be? The so-called 8th Demon Sage of Severence, Ryomen Sukuna.