It's summer now. High school life has also entered the summer vacation.

"Want to go back to the underworld?" As soon as Mu Hantian and Aisha finished their breakfast, Lias came with all the members of the Supernatural Research Department.

"That's right. Because you are my servant demons, of course you have to be with your master. Accompany me to my hometown. Grefia asked for your words, Han Tian. By the way, Asia and Geralt are speaking. It's your first time to go!"

"Yes...Yes! It's really nerve-wracking to go to the underworld even though you are alive! I...I thought you had to die before you could go!" Aisha said.

"Yeah. The underworld—hell I've been very interested in before. But, I've been serving the Lord in order to go to heaven... Now that I've become a demon, I can't go to heaven anymore. The **** that I was sent to is really ironic. Hehehe, hell? This is really suitable to become the original believer of the devil."

"Well, I will spend the 20 days of August there. When I come back here, August will be over soon. I plan to practice and do various things in the underworld." Rias pointed the schedule to the Public announced.

"That's it, but I have a lot of things I want to do during my summer vacation." Mu Hantian said.

"Ah, Hantian. Do you have any plans to go?" Lias asked Mu Hantian in surprise.

"Well, we agreed to take Elsa to the hot springs and watch the sea."

"In the case of the sea, there is no underworld, but there is a huge lake. Besides, my hometown has a swimming pool, as well as a hot spring. Is that okay?"

"Aisha, what do you think?" Mu Hantian looked at Aisha.

"Well, I want to see the legendary underworld!"

"That's it, then let's go." Mu Hantian smiled slightly.

"Oh, I'm going to the underworld too."

At some point, a handsome black-haired man was sitting in the corner of the table. That's Azazel... teacher.

"You... where did you come from, come in?" Rias asked Azazel with wide eyes.

"Huh? I walked in through the gate very ordinary. By the way, your maid is very good!"

"Ah, Sakuya is perfect." Mu Hantian said with a smile.

"I see, but I don't feel the breath at all." Kiba said his thoughts without reservation.

"It's because of your lack of practice. I just walked in normally. Let's not talk about this, are you going back to the underworld? In that case, I'm going too. Because I'm your 'teacher'."

Saying that, Azazel took out the notepad from his arms, opened it and read it.

"Schedule in the underworld... After Rias returns to her hometown, she will introduce the demons to the current leader. Then, there will be a meeting with the new young demons. Then there will be your training courses. I am mainly in charge of your training. . While you're staying at Gremory's house, I'll go and meet Sazex and the others. Seriously, it's too much trouble."

"Then Azazel—the teacher wants to go there together? Can I make the appointment?" Rias asked.

Azazel nodded after hearing Rias's words.

"That's it, I'll trouble you. This is the first time I've entered the underworld using the demon route. I'm really looking forward to it. I usually use the fallen angel route."

Underworld? How did it go? Do you still need to use a magic circle? The underworld is divided into two parts by the world of demons and the world of fallen angels. However, now that the estrangement has disappeared because of the peace, the two sides have begun to communicate. Mu Hantian thought so.

………………

It's time to leave. The first place Mu Hantian and the others went was the nearby station. He was wearing the summer uniform of Kuo Academy. Rias said that if she was going to the underworld, this was the ideal formal attire.

Everyone walked to the elevator in the station. It was an elevator that felt a little narrow when five people with luggage squeezed in.

After entering, Rias and Akeno said, "Then first, Han Tian, ​​Asia and Xenovia will come in first. Let's go down first.

"Go down?" Elsa was puzzled.

"Well, you'll know when you come in." Rias waved to the three with a wry smile. The three looked at each other and walked in.

"Ise, you've been here a few times, so let's go with Yuto and the others."

"Yes, Minister."

At this time, Ise responded to Rias and the elevator door closed.

As expected, there are only 1 and 2 on the floor panel. But Rias took out what looked like a card from the pocket of her skirt and put it on the electronic panel.

beep.

An electronic sound rang out. was reacting to the card.

then……

bang.

A sense of decline hit Mu Hantian! Eh! Falling? interesting. Elsa is quite surprised! Xenovia just tilted her head in confusion.

Rias explained: "Under this station, there is a secret floor. This is a route dedicated to demons. Ordinary humans will never get it even if they spend their entire lives. Such a domain dedicated to demons is in this city. It's quite secretive."

About a minute or so passed after the descent started. The elevator finally stopped.

After the door opened, "Okay, let's go out." Lias urged, and as soon as she walked out, what caught everyone's eyes was—a vast artificial space! There is a huge hole in the ground! It looks like a station platform. However, the modeling degree is a little different from the things in the human world...and the railway! Is this really a station?

After waiting for a while, Ise, Asazel and the others also got off the elevator. Following Rias and Akeno, the crowd began to move.

Zhu Nai didn't know when he came to Mu Hantian's side, and suddenly held his hand! Mu Hantian smiled bitterly, and then held Zhu Nai's hand just like he usually held Aisha's hand.

Well, from that day on, Zhu Nai had an idea for Mu Hantian.

After turning right and left, everyone came to an empty space again.

In front of everyone is something like a train!

The body is sharply angled, and the coat of arms that indicates the identity of the devil is engraved... That's the coat of arms of Gremory!

"This is the train owned by the Gremory family." Rias replied.

Puchi.

While Asia and Gerova were surprised, the door of the train opened automatically, and everyone followed Rias and entered the train.

The departure whistle sounded, and the train began to operate.

Mu Hantian and others are currently sitting in the center of the train. On the other hand, Rias was in the front compartment of the train, and her family seemed to be staying in the center or the rear compartment. Unexpectedly, there are such small regulations.

Now Mu Hantian and Aisha are sitting next to each other, with Zhu Nai and Xenovia sitting opposite.

Sitting next door is Kitten, Gasper, Kiba and Issei, and a little further ahead is Azazel, ah, have you entered sleep mode already?

After starting for a few minutes. The train entered the dark road.

"How long will it take to arrive?" Mu Hantian asked Zhu Nai.

"It will be there in about an hour. Because this train will use official methods to pass through the dimensional wall."

"I originally thought it was a magic circle to transfer to the underworld."

"Usually this method is also feasible, but if the new demon demon does not enter the country once through the official route, it will be regarded as illegal entry and will be punished. Therefore, it must follow the official entry procedures."

"That's it."

"Sorry, excuse me." An old man came over, it was an old man. Wearing a captain's uniform. The white beard looks very clean.

After the man took off his hat, he bowed his head to the crowd.

"It is a pleasure to meet, the new demons of the princess. I am the captain of this Gremory special train. My name is Reynaldo. Please give me more advice in the future."

"It's a pleasure to meet each other! I'm the 'soldier' ​​of Rias Gremory-sama, Issei Hyoudou! Please advise me!"

"I'm Xenovia. 'Knight', please take care of me in the future."

"I'm Mu Hantian, originally from a 'chariot', but I don't know why, the chess piece has left my body, but... please give me more advice."

After saying hello, the commander——Renaldo took out a special machine that he didn't know what to do, and turned what looked like a monitor to the crowd.

"Then...that...?" Asia and Xenovia didn't know what to do.

Rias and Akeno seemed to know what it was.

"This is a machine for confirming and checking your demon world. These two trains are an important and solemn means of moving into the underworld. If there is an impostor, something terrible will happen. In this day and age, if the train Being kidnapped is incredible." Rias explained with a smile.

"Because you are given the chess pieces that have been logged in, there will be records in the underworld when you are reincarnated. So you can use that machine to check. There is no problem, because everyone is himself."

"Princess, while checking this, everyone who is a new face has already completed the immigration procedures. Please take a rest until you arrive at the scheduled station. The carriage with beds and the dining car are also prepared, so please feel free to arrive at your destination. ' Reinaldo smiled.

"Thank you, Reinaldo. Is it Azazel next?"

Rias looked at Azazel, but Azazel was sleeping soundly.

"Thanks to him for being able to fall asleep in the moving train of a race that was hostile not long ago." Rias was a little surprised, but she still laughed.

"Hehehe. Lord Governor of the Fallen Angel really likes peace." Reinaldo also laughed happily.

In the end, the verification was over while Asachel was asleep, and all the staff successfully completed the entry procedures.