After saying goodbye to Gojo the squirrel, Yuuji, Amilia and Kazuma all headed forward through the jungle determined to know who's responsible for the incidents on the island, Especially the dream manipulation. Knowing that he could get into people's heads and manipulate their dreams they were all very wary of that 'thing' that's on this island. And they know that no visitor of this island ever came back home. 

"Proceed with caution we don't know what this thing is"-said Yuuji 

"No need. I can slice them in half with my family art of fighting"-said Kazuma in a very monotone voice

"It's not about you slicing people in half it's about noting what's on the island to report it back to the adventurer's guild"-said Yuuji shaking his head

"If we get rid of the danger then we don't need to report anything anymore we can just hand them the corpse of whatever entity that is"-said Kazuma in the same tone 

"You dare challenge me, son of Kamahara Satou"-??

"Why don't you show yourself you weak creature ?"-shouted Yuuji

"Such a fool you think you can kill me, I, the protector of the Juraia forest"

suddenly the weather which was clear not a moment ago turned dark with thunder all over the place with rain coming down. with a bright lightning strike a creature with 6 hands and in a meditating pose showed up 

"Such fools. You little bugs dare to challenge me"

Yuuji suddenly pulls Kazuma who was readying his sword for a fight shaking his head telling him to not do anything stupid 

"Son of Satou, Daughter of Felix and You. i don't know you? you're not from this world. Interesting indeed. You, tell me your name"

"I'm Yuuji Wakana, and yes i'm not from this world"

"hmm Wakana. Indeed a foreign name to this land. "

"I'm not here for idle chit-chat i'm here to know what's the deal with all the adventurers dying on this island and i have no issue fighting you for it"-said Yuuji pulling out his sword 

"HAHAHA. Human you're very interesting. You really did get me excited. For that i will bestow the honour of knowing my name on you. My name is Koro short for the word unkillable in the ancient language"

"Wait ancient language ? that's Japanese for all i know and it's short for korose nai"-thought Yuuji to himself 

"Then we should battle, Koro"-said Kazuma

"I did not give you the honour to call me with my name you insect"-said Koro sounding annoyed 

"I'd rather solve it by diplomatic means instead"-said Amilia 

"Good idea, Human. I'd rather not exert effort wiping all three of you off the planet"-said Koro

"Then what do you suggest"-said Yuuji

"Hmm I'll let everyone leave the island alive with the condition to not say anything you discovered on this island"-said Koro 

"What if we refuse"-said Kazuma 

"well then you shall never return home"-said Koro 

Yuuji looked at Amilia and Kazuma who both looked ready for a fight but while looking Yuuji noticed Kazuma sweating a lot and his breathing becoming slower as if he was completely tired from some fever or something on his mind

"I accept, Koro"-said Yuuji

"But Yuuji-san that's-"-said Kazuma being interrupted by Yuuji

"You're about to collapse you idiot i won't risk it"-said Yuuji looking at Kazuma 

"You, Human. You changed my look at some of your kind. I shall allow you to leave and treat your ill friend. Keep the agreement or you'll be gone from everyone's memories"-said Koro 

after Yuuji and Koro shook hands Yuuji, Amilia and Kazuma were all teleported outside the forest and onto the beach again. Yuuji carrying Kazuma whose fever has gotten worse they went back to camp telling everyone that they will be leaving the island at once and that they will not report anything to the guild if they want to keep their lives

Boarding the ship they started their journey back to Aetherland.