Kuoh Academy.
The destruction caused by an attack from a fallen angel affiliated with Grigori, Kokabiel, had disappeared as if nothing happened. This was done by the magic of a devil who was sent to eliminate the intruder.
Kokabiel had attacked Kuoh town, where the main base of the Gremory family, one of the 72 pillars of the underworld, was located. He wanted to use the lives of civilians to force the Gremory's heir and other devils to submit.
The attack ended up as a three-way fight between the fallen angels, devils, and the church.
And now, everything was over and returned to normal.
A red-haired girl sat behind a desk with paperwork piled up. She was sighing tiredly, and it looked like she had been working since morning. Her expression was that of someone who had worked for a very long time without any rest. Her blue eyes seemed weary.
She wore a uniform that all girls from Kuoh academy must wear, a black blazer, with a white blouse underneath, and a corset-like top. A black tie was hanging from her collar. Her short red skirt showed off her shapely thighs and long legs, along with her white knee-high socks and black school shoes.
She is Rias Gremory, a third-year student and a king among devils.
"Phew, it's finally done. I need a break."
As soon as she finished her work, Rias leaned back and let out a relieved sigh. Her friend as well as the Queen in her peerage, Akeno, brought tea and cake for her. The black-haired beauty in her school uniform smiled and handed her the tea and cake. Rias gratefully took them, then asked about the status of the school.
"It's going smoothly, President," said Akeno as she took a seat next to her.
"I see... Thank you for your hard work."
"No problem. Oh, and there is one more thing. We found a strange thing after fixing the backyard of our Occult Research Club. Maybe you should see this."
"A strange thing?" asked Rias curiously as she put down her cup and saucer on the desk. Akeno nodded and led Rias to the window.
From the window of the second floor of the old school building, they could see the backyard of the building. And in the middle of the backyard, a cave-like structure stood tall. The entrance was large and wide enough for three people to stand side by side, with a wooden board with the words, "Fun Fun Dungeon!"
"What... Is this thing?" asked Rias, confused by what she saw. She had never seen anything like it before in her life. Akeno shrugged.
"We don't know. But I don't think we should check it out, President. It might be a trap that Kokabiel or the fallen angels left."
"It's more dangerous if left unchecked." Rias rose up and went downstairs with Akeno. Then, the two of them stepped outside the old school building, approaching the cave.
Rias cautiously looked at the cave with crossed arms, and then turned around to face Akeno.
"Call everyone to gather. We will check together in case we need to fight. Issei-kun and Kiba-kun would be a great help."
Akeno nodded and took out her phone. She called everyone and soon they arrived. A brown-haired boy, a blonde boy, and a white-haired girl.
"I'm here!" Issei Hyoudou, a perverted second year high schooler said. His eyes were glued to Rias's chest. "Wow, as expected, your boobs are really huge, President."
"Issei-kun, please pay attention." Yuuto Kiba, the blonde pretty-boy, sighed. He then turned his gaze towards Rias and smiled brightly. "President, what can I help with?"
"You too. Pay attention." Koneko, a white-haired petite first year, sighed.
"I'm sorry..." Issei scratched the back of his head while laughing nervously.
"It's fine. Anyway, I called everyone because we found something strange." Rias pointed to the cave and explained, "It suddenly appeared here. We have yet to investigate but I plan to enter. To be safe, I plan to have everyone with me."
"I will be more than glad to go." Akeno said.
"Of course! Let me prove to my master how reliable her pawn is." Issei grinned and flexed his arm. Kiba and Koneko also agreed.
"I don't think it's a fallen angel trap, so we don't need to worry about fighting. But we still have to be careful." Rias smiled. Then, she looked serious and asked them to follow her as they walked inside the cave. "Let's go."
The interior of the cave was pitch dark. The group was walking in complete darkness. After a few minutes, they came upon a door.
A sign above the door read, 'Fun Fun Dungeon, 1st floor. Difficulty: G'.
"What is this? Is it some kind of a game?" asked Akeno, confused.
"It's like a dungeon game!" Issei chirped happily. "I'm getting excited. Will there be a female monster? Hehehe, it will be great if they have big boobs!"
"Ara, Issei. To think you would say that in front of me." Rias smiled. She put her hand on his shoulder and said, "It makes me sad, you know."
"Hehehe, of course yours are the best, President!"
"I'm glad." She smiled teasingly, "Now let's go."
As the group continued walking through the cave, the path ahead began to widen. A clearing was waiting for them. And in that clearing, a green-skinned creature appeared. It was holding a wooden club.
It had an ugly face and looked angry, its eyes were bloodshot red and drooling. Five heads turned to them as it roared, "Groooaaa!"
"A goblin!" Issei shouted, he looked scared.
***
What was a goblin?
In a RPG game, a goblin was usually a weak monster, but in fantasy and medieval era, it was a fearsome monster that appeared in stories and tales.
They were described as small, greenish humanoid creatures with sharp fangs, pointed ears, and red eyes that would eat anything they could get their hands on. In reality, the goblins that lived in forests or caves would hunt and kill humans who wandered too close to them, often stealing children and livestock.
In short, they were dangerous even though they were weaker than devils. That said, these were only stories that humans came up with.
The goblins that appeared before the group were around the height of a human teenager. Their skin was a dark shade of green and their faces were covered with scars from fighting and killing.
Their eyes were large and bulging out of their sockets. They wore tattered clothes made from animal fur or hide.
Cain watched as Rias' group prepared for battle. The goblins raised their clubs high into the air, growling as they charged forward.