The Emperor of Demise, Tohru's father, felt a complex mix of emotions. He both hoped Yusei could break his barrier, yet simultaneously did not want Yusei to succeed.
But no matter what, he chose not to take the initiative to attack.
After Yusei mastered the Futsu no Mitama, the suddenly changed aura around him made Tohru's father pause.
'This kid... He got stronger again? Did he have no limits?'
He could clearly feel that within that massive energy body, Yusei's strength had risen yet another level.
But before he could react, he heard Yusei's voice from afar.
"Tohru, don't intervene. I want to prove it to this stubborn old dragon."
Hearing this, Tohru's father was both angered and amused, 'Heh, still wants a one-on-one? Really thinks I can only take hits?'
"Kid, aren't you too-" He was about to mock, the word 'arrogant' still unspoken, when a tremendous thunderbolt struck his head.
This was lightning completely different from before… It's purer, more savage.
Caught off guard and driven into the ground, Tohru's father struggled against the lightning dragon biting into his neck.
"Such intense lightning element... how is this kid controlling it?"
Tohru's father gritted his teeth. His dark barrier expanded, trying to repel the lightning. But before he could regain his bearings, a massive, lightning-shrouded figure descended with a long sword.
The dark shield immediately deployed.
The blue, ethereal greatsword collided with the dark shield. Like a meteor crashing into the earth, a tremendous roar erupted, and the point of impact exploded.
Futsu no Mitama remained completely intact. The dark barrier, however, like a glass bottle, lasted only two or three seconds before shattering completely.
The Emperor of Demise's pupils contracted sharply. Facing the sword about to strike him, he couldn't muster any reaction.
Boom!
Futsu no Mitama was perfectly controlled, stopping just above Tohru's father's head, crackling lightning coiling around the blade.
Yusei, inside the diamond crystal of the Susanoo, looked down at Tohru's father from his superior position.
Tohru's father's expression was silent. His massive dragon body transformed into a human form. Seeing this, Yusei likewise dispersed the Susanoo.
As for the Futsu no Mitama, there was no longer a physical 'sword'… it had completely and voluntarily integrated into Yusei's power.
Yusei currently couldn't separate it out, only utilize it.
"No need, I admit defeat. That final strike... was quite impressive." Tohru's father looked at this human youth and sighed several times.
Simultaneously, he felt somewhat depressed and humiliated. He had been overconfident, using only half his power for defense.
Originally thinking a shield at half strength would be enough to block, he never expected this youth to give him a surprise... no, a shock.
If that sword had landed just now, he estimated he would have been seriously injured.
'If I had defended with my full power, I definitely could have...' The Emperor of Demise thought this, but it was too late. Having been defeated, he had no grounds to go back on his word.
In the end, he could only sigh and look somewhat irritably at his daughter, who had transformed into her human form and happily threw herself at Yusei.
"You've won. I will no longer interfere with Tohru staying in the human world..."
"Great, Yusei!" The moment her father finished speaking, Tohru over there jumped for joy again.
Watching Tohru being so intimate with this brat, her father's frustration and displeasure grew even more severe.
His face darkened, "I won't stop you, but I must state clearly, and this is also advice: one of you is human, the other a dragon. The hurdle of lifespan is something you simply cannot cross."
"You need to be mentally prepared for this."
Hearing this, the smile on Tohru's face stiffened, clearly also reminded of this problem.
But Yusei calmly said, "That problem doesn't need to worry you. I said I would be with Tohru forever. This 'forever' isn't a human's few decades, but truly forever."
"Arrogant!" Tohru's father scolded, his face dark, "Even long-lived dragons cannot live forever! Life has length, but ultimately, it has an end!"
"That's merely the end as you know it, not my end," Yusei retorted without hesitation, "You can't think of a way doesn't mean I can't think of a way."
"You!" Tohru's father was furious. If it weren't for this kid having some potential and having just beaten him, he really wanted to finish him off.
But after all, he was his daughter's beloved. Although human, his character and strength were decent. Tohru's father could only soften his tone and say, "Your world has no treasures for immortality. This world has none either. Even things that extend lifespan are extremely rare. This is the law of nature."
"I won't say more. In any case, you and Tohru, cherish these hundred or so years. A hundred years from now, I will come to take you back, Tohru."
Shaking his head and sighing, Tohru's father waved his hand and opened a portal leading back to Yusei's world.
Yusei and Tohru, hand in hand, returned together to his world.
As for copying that ability, Yusei had checked. Tohru actually had it too, but it was only for traveling between these two worlds.
With Kanna and Tohru by his side, he didn't need to occupy a skill slot just for that… it was too wasteful.
Furthermore, he didn't frequently travel between worlds himself.
After this incident, Yusei estimated it would be a very, very long time before he went back.
Appearing again in the hallway of his home, he looked down from above at the street, where many people still lay haphazardly on the ground.
On the streets, many police and doctors urgently dispatched from other areas were going all out to settle the unconscious people.
Yusei knew they were just asleep and didn't pay it much mind. By this time tomorrow, they would be fine, lively fellows again.
Dragging Tohru, who was tightly clinging to his arm, Yusei struggled to open the door, practically pulling Tohru into the house.
He looked at Tohru with a speechless expression, "Can you let go of my arm now? I want to eat."
"Yusei wants to eat? But don't you need to consider something else? Like bathing before eating? Or... eating me?" Tohru batted her eyelashes at Yusei.
Yusei looked at Tohru, who was throwing him a seductive glance, with a face full of exasperation, "No, I'm just very hungry right now. Also, I need to rest. My eyes are very sore and painful."
As he spoke, he had already closed his eyes, which startled Tohru. She immediately wanted to cast a healing spell.