The season opens with Rio, who had been teleported to another world and forcefully transformed into the fearsome Demon King. But when Rio struck the Demon King's core, something unexpected happened. The Demon King did not die—instead, Rio's head was injured, and in that moment of chaos, the Demon King came up with a sinister plan.
He transformed into Rio's exact look, creating a perfect copy. Now calling himself Reo, the Demon King planned to steal the Teleportation Orb and offer it to the Supreme God. With it, he could travel freely between worlds without using his own powers.
Meanwhile, the real Rio sat helpless in a dark demon prison. Powerless. Injured. Heartbroken. Tears rolled down his face as he whispered,
"I just want the Supreme God to give my powers back… I lost everything because of my second birth."
Far away, Anita was also in shock. She had witnessed Rio transform into a monster—yet someone explained that the creature wasn't him at all. Still, Anita wasn't worried about Rio. Her only thought was: How will I get back to Heaven now?
Then another scene unfolded.
A girl moved silently through the demon jail. The guards lay dead on the ground, but her face remained hidden in the shadows. She walked to Rio's cage and sighed.
"Brother… you really find trouble everywhere," she said. "How many times do I have to tell you to become stronger?"
With a snap of her fingers, the cage shattered. She freed not just Rio but every prisoner trapped by demons. Rio stared in confusion.
"Who are you?"
The girl raised an eyebrow. "Have you forgotten? I'm your sister. Gomati."
Rio blinked. "I… don't have a sister."
Gomati slapped him sharply. "Now do you remember?"
A sudden vision flashed through Rio's mind—a past where she truly was his sister in this world. When he returned to reality, he whispered, "Sister… there's a girl with me."
"Who?" Gomati teased. "Did a duffer finally become your girlfriend?"
"She's not my girlfriend!" Rio protested.
Following Rio's spiritual energy, Anita found her way to his home. The moment she saw him, she attacked. But Gomati stepped between them.
"You can't hurt my brother."
"He's a demon!" Anita shouted. "He will kill you!"
Rio clenched his fists. "Who told you I'm a demon?"
Anita's voice trembled. "You were with me… then suddenly you transformed into a monster and vanished to another world."
Gomati sighed. "Enough. I have something to prove it."
She took out a small stone.
"This turns red if a demon touches it, and blue if a human does."
Rio placed his hand on the stone. It glowed bright blue.
Anita gasped. "Then… who was with me?"
Rio's expression darkened. "I know who."
"Who?" Anita asked.
"The Demon King."
Anita slapped her forehead. "So for two days… I was with a demon? Can you believe it!"
Rio smirked. "Yes. You also looked like a demon."
Anita slapped him instantly. "Don't say that again!"
Gomati stepped forward. "This is my brother—only I can slap him!"
Rio held up his hands. "Nobody should slap me."
Gomati slapped him again. "Only I can."
"Fine," Rio muttered, "only you."
Anita slapped him once more. "Only I can slap him!"
"I'm leaving!" Rio exclaimed and walked out, while Anita and Gomati continued arguing behind him.
On his way to the market, someone stepped in front of him.
"There you are! I've been searching for you for two days!" the boy said.
Rio frowned. "Who are you?"
"I'm your best friend—Grok!"
Another flash of memory hit Rio. Grok truly had been his closest friend, unimaginably strong.
"Right… I forgot," Rio said.
Grok crossed his arms. "Don't lie. You forgot because Anita and your sister slapped you too much."
Rio looked away, embarrassed.
"Anyway," Grok said, "today is your match with Haruto."
The name made Rio's blood boil. "Take me to him."
"You may be strong," Grok warned, "but Haruto is stronger."
Rio growled, "This is the last time I'm asking. Take. Me. To. Him."
"Okay, okay!" Grok raised his hands. "Don't explode."
They reached the arena. Haruto smirked. "If you don't want to fight, just admit you're a loser. I'll forgive you."
Rio ignored him and stepped onto the ground. "Stop talking. My time is precious."
The countdown began.
3… 2… 1… Start!
Rio clapped his hands once.
Haruto dropped dead instantly.
The crowd screamed in horror.
Rio clapped again—Haruto revived, gasping for air. Rio's eyes turned blood red, and the sky darkened. A terrifying energy exploded from him.
Rio laughed like a demon… and slaughtered every person in the arena.
Then the Supreme God descended from the heavens.
"Your powers have gone out of control," he warned.
Rio turned toward him with madness in his eyes. "Who are you? I will kill you too!"
He launched his strongest attack—but the Supreme God dodged effortlessly.
Then the Supreme God clapped his hands.
And the entire universe shifted.