Nobody's POV:
Serena was watching Inosuke head-butting the train as Zenitsu was trying to stop him even, it was really embarrassing too. That is, because they are in public as the people were watching them. Tanjiro & Inosuke never seen a train because they live on a mountain.

"What the hell is this creature?! I bet it's this thing! The king of this land! The ruler of this land! I'm going to shreds it!" Inosuke said as Zenitsu was getting annoyed of him. "Wait! Inosuke! This is a train. The train takes people to their destination, they want to go" Serena said to Inosuke as he was still head-butting the train.

"I think you should stop, Inosuke. Before, we be-" Serena said but I was cut off by the sound of the whistles and, policemen came to their sight. Serena and Zenitsu screamed in fear. "It's the policemen! We need to get going!" Serena said in fear. She was prepared to run until Zenitsu scooped Serena up like a bride before he took off with her. Tanjiro's eye twitched and felt jealous of him, then he grabbed Inosuke as they followed them too.

"Thanks to you, we went through hell, Inosuke! Say you're sorry!" Zenitsu said as he was really angry of him. "Huh?! Why did we have to run from the police in the first place?!" "The Demon Slayer aren't officially recognized by the goverment. So, we can't walk around with our katanas openly- eh? What are you doing?" Zenitsu asked as Inosuke puts his katanas inside his pants. He twirled like a ballerina, before he posed proudly, showing off his new look.

"Okay... Inosuke is becoming weirder" Serena said to herself as she give him a weird look on her face.

Then they heard the sound of the train blowing caught their attention as they looked to see it had begun to move.

"Oh no! It's already moving?! What about the police?!" Zentisu asked as he panic and sacred until Serena broke the silence. "Come on, guys! We need to hurry up to the train before we'll miss it!" Serena said as she started to run to the train until she made it on the train.

"Follow Serena!" Tanjiro said as they followed her. Tanjiro & Inosuke made it onto the train, while Zenitsu was running for his life. He managed to grip the railings, but his body lost weight and he started to tumble back. Before he could lose his grip, Serena shot her hand out and grabbed his own, pulling him into the train.

"Serena-chan..." Zenitsu sniffed, before he burst into tears and hugged her. "I knew my wife cared about me! You're such a sweetheart, Serena-chan!" Zenitsu said as Serena just smiled at him.

"No problem, Zenitsu. We can't just leave you behind, that will be not nice to do" Serena said as Tanjiro was getting really jealous of him. Then Serena went inside the train as Tanjiro, Zenitsu and Inosuke followed behind her.