Seeing Yumiko's unusually shocked expression, Yami Tsukishiro spoke calmly.
"I know you must be feeling extremely confused right now. Take your time. Calm down first… then give me your answer."
He slowly released her hand.
"But there is one thing I need to make absolutely clear."
"Even if Yumiko chooses to reject me, I will never give up so easily."
"Because to me… you are already someone irreplaceable."
His tone gradually turned serious.
"I'm extremely possessive. And my jealousy is heavier than a mountain."
"If I were to discover anyone daring to take advantage of you, I honestly don't think I'd be able to suppress my murderous intent."
"I would kill him."
"So… I hope you can understand what kind of person I am."
After saying this, Yami Tsukishiro fell silent, quietly gazing at Yumiko.
The emotion in his eyes was deep and sincere—like a bottomless lake that swallowed everything reflected within it.
Yumiko listened without blinking, her gaze never leaving him for even a second.
At this moment, it felt as though only the two of them existed in the entire world.
Those words—words that should have made her hair stand on end—instead caused her heart to pound violently, like a thunder drum echoing in her chest.
It wasn't fear.
The uncontrollable throbbing in her heart was stronger than anything she had ever felt before.
The image of the boy who once saved her from being bullied flashed through her mind again and again, like scenes from an old movie.
That heroic figure overlapped with the man before her now—a man openly confessing his terrifying possessiveness.
This feeling…
It was wonderful.
An unstoppable surge of emotion flooded her heart, finally breaking through the last defenses of her soul.
She took a breath, gently lifted her hair with queen-like elegance, and tried to regain her usual composure.
"Hmph, Mr. Yami Tsukishiro… aren't you being awfully scheming?"
"You say all that, yet you've left me absolutely no room to choose."
As she spoke, Yumiko's red lips parted slightly.
She rose onto her tiptoes like a nimble deer and kissed him without hesitation.
It was light—soft as falling petals, fleeting like a flash of light.
Then she pulled away just as quickly.
Straightening her posture, she pointed at him.
"Since you've made that oath, then you'd better do everything in your power to hold on to me—your Yumiko."
"But remember this."
"Yui is the only one. You must never hurt her."
"If she gets hurt even a little… I will leave you without a single regret."
"Even if I end up begging on the streets, I'll still have to endure heartbreak for the rest of my life."
Hearing her firm answer, the corners of Yami Tsukishiro's lips lifted into a confident smile.
"Yumiko… in this life, you don't need to worry about marrying a homeless man."
"Because only I can give you true happiness."
"You and Yui… you'll both marry me of your own will."
"H-How shameless!"
Yumiko muttered, turning her head away shyly.
Yet the joy she couldn't suppress curved her lips ever so slightly.
This promise felt like a precious gem—something she wanted to hide deep within her heart.
Yami Tsukishiro's mind, however, was calm as still water.
He knew he had succeeded in winning Yumiko's heart—even if it felt a little like something straight out of an idol drama.
But perhaps… this was exactly the tone Yumiko liked.
And more importantly—everything he said was the truth.
For Yumiko, he would probably kill every man who dared approach her.
He was, after all, a purely evil person.
"Yumiko," he said softly, "I still need to confirm your abilities."
Still immersed in happiness, Yumiko nestled closer into his warm embrace.
She began explaining her understanding of her powers.
"I've tried forming contracts with insects… like butterflies."
"To my surprise, the process went very smoothly. Almost no resistance, and the energy consumption was extremely low."
"After the contract is completed, the butterfly automatically enters the contract space."
"Just calling it in your heart is enough—it responds obediently."
As she spoke, she raised her jade-like hand and released a summoning circle glowing with mysterious light.
"Chi—chi!"
However, what emerged wasn't a butterfly.
It was a lively, adorable little sparrow.
It landed obediently in Yumiko's palm, tilting its fluffy head as it curiously looked at Yami Tsukishiro.
Yumiko quickly explained.
"The contract can be terminated. Once it's terminated, the contracted creature regains its freedom."
"And after that, the contract slot becomes vacant again and can be reused."
In other words—
She had ended the butterfly's contract and formed a new one with the sparrow.
Yumiko looked up, her voice tinged with helplessness.
"When contracting this sparrow, the energy consumption was much higher than with the butterfly."
The explanation was clear.
First: the contract allows control over the contracted entity.
Second: energy consumption varies depending on the creature.
Third: contracts can be replaced after termination.
Yami Tsukishiro asked calmly, "How many contract targets can you handle right now?"
Yumiko lowered her head awkwardly.
"I'm sorry, Mr. Yami Tsukishiro… I can only manage one."
"Alright. Listen carefully—terminate the contract."
As his girlfriend, Yumiko naturally obeyed.
She immediately released the contract.
The moment it ended, the sparrow flapped its wings and flew away freely.
Yami Tsukishiro summoned the Multiverse Dungeon interface.
His gaze swept over the 270,000 magic stones displayed—hard-earned resources from adventurers and miners.
First, he created the newly unlocked protozoan template: [Evil Demon], a meme suitable only for the embryonic [Evil Demon Ancestor].
He also selected physical enhancement and speed memes, integrating them all into the original embryo.
[Ding. Hatching the original embryo requires 10,000 magic stones. Proceed?]
"Incubate."
[Ding. Monster embryo successfully hatched. Template acquired: Evil Demon Ancestor.]
[Monster]: Evil Demon Ancestor
[Rank]: Tier 3
[Title]: Rare
[Race]: Undead
[Memes]
D-Rank: Speed (Lv.3), Physical Enhancement (Lv.3)
C-Rank: Demon Ancestor (Lv.3), Blood Demon Art (Lv.3)
A pale female monster appeared before them.
What surprised Yami Tsukishiro was the absence of any F-rank racial meme.
Instead, it possessed an extra C-rank Blood Demon Art—something he hadn't manually added.
"In addition to regeneration… Evil Demons can use Blood Demon Arts?"
A thought flashed through his mind.
He immediately spent 3,000 magic stones to hatch three thousand ordinary demons.
After careful experimentation and observation, a conclusion formed.
The Evil Demons he created were still bound by the fatal weakness of sunlight.
Whether a demon possessed Blood Demon Arts—and what kind—was entirely random.
Among the thousands created, many lacked vampiric traits altogether.
Those that did possess Blood Demon Arts exhibited wildly different abilities.
Unpredictable.
Without hesitation, Yami Tsukishiro invested another 10,000 magic stones to create a second Evil Demon Ancestor with identical parameters.
The result stunned him.
The Blood Demon Art of this one was completely different.
The first specialized in blood manipulation.
The second… wielded spatial abilities.
A single phrase surfaced in his mind.
Opening blind boxes.
"It all depends on luck, huh…"
He sighed softly.
All Evil Demons—including the second ancestor—were sent to the Bone Cemetery, where he created an eternal-darkness zone exclusively for them.
After finishing the arrangements, he summoned the remaining Evil Demon Ancestor to the real world.
From start to finish, Yumiko stayed quietly in his arms, gazing at his face tenderly, as though she could never get enough.
That brief kiss had completely intoxicated her.
She suddenly felt a strange ripple distort the air in front of them.
A woman appeared—wearing a blood-red knee-length dress, matching heels, and a crimson hat.
Sharp red claws glinted coldly at the ends of her fingers.
Her skin was pale as paper.
"D-Demon…!"
Fear shot through Yumiko. She clutched Yami Tsukishiro's hand like a frightened deer.
"Yami Tsukishiro-kun! There's a monster!"
He gently held her hand and comforted her.
"Don't be afraid. She isn't hostile."
He had even dressed the monster beforehand to avoid scaring her—yet it was still frightening.
"Yumiko, try forming a contract with the monster I created."
"She won't resist."
"Creating monsters…?"
The concept sounded like pure fantasy to Yumiko.
Still, she obediently raised her hand and activated her contract ability.
A blue pattern spread beneath the demon's feet.
As promised, the monster showed no resistance.
Yet Yumiko's face quickly turned pale as her energy drained rapidly.
Yami Tsukishiro immediately understood—
Contracting a higher-level lifeform required enormous energy.
He leaned close and whispered.
"Don't panic. I'll replenish your source energy."
Instead of transferring it directly through his hand, he chose a more intimate method.
The exchange of energy… through a kiss.
Yumiko barely heard his words before his lips met hers.
The kiss was far deeper and more passionate than before.
In that moment, emotions and energy intertwined.
Warm, surging source energy flooded into her body like a tide.
In an instant, her depleted reserves were restored.
Comfort washed over her like spring sunlight.
The magic circle shone brightly once again.
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