Luffy was taking a minute from eating like a black hole for a second when he spotted the weird portal. It was flashy and making weird movements. It got his curiosity so of course he went to check it out.

''Hey guys! Come here.'' Said Luffy wanting to call his crew, but they were busying party, only Trafalgar and Kidd heard him.

''Look here Straw Hat ya we are tired we don't have time for your games.'' Said Law

''What are you seeing now dumbass?" Asked Kidd.

''THAT!'' Scream Luffy pointing at the portal.

The two captains saw the strange portal and were both confused over that. It was something that they never seen before.

''What is that?" Asked Kidd

''I don't know.'' Said Law

''Come on, let's take a closer look.'' Said Luffy grabbing both captain by their hands and dragging them with him.

''Wait!'' Scream Law

''don't drag us along with you!" Scream Kidd

''yes, we are not friends!"' Scream Law snapping his hands out of Luffy.

The two stopped being dragged and look at Luffy with a look of ´´seriously´´ and expect some explanation, but of course Luffy was just chipper and excited.

''Come on! You guys never saw something amazing as this? A chance like this will never come. How about we check it out, I haven't done something exciting in hours.'' Said Luffy.

''You just fought a yonko and won, what else do you want?" Asked Kidd

''I like to always find the next adventure. I thoughts you guys were like this, I bet you two are scared to see that portal.'' Said Luffy.

The implication that Luffy made gave both Kidd and Law some rage issue. If they weren't allies both would beat the crap out of the straw Hat pirate, but since it was just something small they decided to go along.

''I am not a coward! I will go there and prove it to you!'' Said Kidd.

''Neither am I.'' Said Law

''Good, so let's go Tra and Jaggy.'' Said Luffy.

''At least lets us warm our crews.'' Said Tra.

''Sure.'' Said Luffy and the two did that.

''Hey, I am going to Straw Hat-ya see a weird thing. Don't leave the island.' Said Law to his crew.

''Aye captain!'' Said the heart pirates.

''Same here, gotta prove something to this idiot. Killer you are in charge.'' Said Kidd.

''You got it Kidd.'' Said Killer

''I am out for a minute guys. Don't go anywhere.'' Said Luffy.

''Ok Luffy.'' Said Zoro

The trio then went more closer to that portal looking thing and they took a look from a far distance.

''So do you think it might be one of Wano mystical crap?" Asked Kidd to Law.

''Ok, I don't know much about the full foundation of this country but i can assure you that this place is nothing like the other island we been through.'' Said Law

The trio then felt a weird push there, Kidd and Law didn't like that while Luffy didn't bother.

''Uh do you feel some kind push?" Asked Kidd.

''Yes, I think we need to return.'' Said Law

Then the impredicatble happen when Luffy started to fall to the portal and was getting sucked in. Much to Kidd and Law horror.

''Wait! I don't know what is happening.'' Said Luffy scared.

''What are you doing idiot? Grab something until we gather your crew.'' Said Law.

''No, don't leave me.'' Said Luffy scared and he grabbed both Law and Kidd coats which made them pale.

''NO YOU IDIO…'' Said the two and then they were vanished.

In just a second Luffy, Law and Kidd disappeared out from the face of Wano. Thanks to the mystical portal left by the user of the Portal Portal Fruit who lives in the country.

The crews just relaxed not realizing that their captain all got abducted and were now in somewhere never seen before.

In Early Twenty Century Japan.

The forest was dark and full of danger, three young boys were there and full of energy. Rumor has it a demon was there, and it was a very powerful one indeed.

Tanjiro, Inosuke and Zenitsu were all certified Demon Slayers but never imagined dealing with a treat of this level on this place at this time of the night.

''Calm down Zenitsu. You are going to leak our location.'' Said Tanjiro.

''I am not calm! Its three against a demon! Do you know what he is going to do!" Asked Zenitsu scared.

''Hey! Shut up or I will smack you!' Scream Inosuke.

'Please, don't start with this you stupid pig.'' Said Zenitsu.

Tanjiro just smile at his new friends bantering. It wasn't the right moment but he was calm knowing he had trustworthy people with him. While he was thinking of what to do next his nose caught something in the air. It was the smell of meat, alcohol and rust.

''Do you smell this?" Asked him.

''I don't smell anything, and I guess this idiot also.'' Said Zenitsu.

Soon something started to be heard from a distance and it was coming from the sky. That made the trio look up.

''Huh?" Asked them.

Tanjiro, Zenitsu and Inosuke were in shock to see three people falling out from the sky. In the middle out of the night with no idea.

''AAAAAAAAAAAAAAAAAAAAAH!'' Scream Luffy, Law and Kid.

''What is that?' Asked Tanjiro.

So yes, firs we have the trio of captains in the demon's slayer world. I am so excited to see how this will turn out. I can't wait for them to fight Rui. Talk about something epic.