Sunday.

Chika had visited Shiori that morning for their now-traditional simultaneous play session of Fantasia World.

"I’m here, big sister!"

"Welcome, Chika."

Chika entered through the front door with a smile on her face, and Shiori welcomed her in with a smile of her own. As she entered the room from the entrance, Chika excitedly took off the backpack she was carrying and took out her VR equipment.

"Alright, big sister... let’s get started!"

"Yes, let’s do it."

As Chika held up her VR device, Shiori also picked up a VR device that was lying beside the bed and showed it to Chika. After setting up their equipment, the two immediately logged into the world of Fantasia World.

"Simultaneous logins detected. Since the last logout locations of the players differ, the login location will be changed to the initial starting location."

As they checked the usual display, Shiori and Chika disembarked at the fountain square in Middle City.

"Okay then... so where should we start this time?"

"I agree."

Shiori and Chika looked at each other and began discussing what they wanted to enjoy this time.

"Well, for now... shall we go to the ’Tower of One-on-One Duels’, sis?"

"Yes, that’s what we decided last time, so let’s start from there."

Shiori nodded in agreement with Chika’s words, and the two used a teleportation card to travel from Middle City to the Tower of Duels. They arrived at the "Tower of One-on-One Duels." After Chika led the way inside, she immediately started fiddling with the terminal, opened the "Challenge Menu," and showed it to Shiori.

"Just take a look at this, sis! I tried a few more times after that and unlocked quite a few new features!"

"Hmm, let’s see..."

Prompted by Chika, Shiori looked at the "Challenge Menu." The first feature there was "the ability to fight multiple monsters." In addition, separate features were unlocked, including a "duel field setting function," a "function to battle different types of monsters simultaneously," and a "setting for monster enhancement levels." Furthermore, by unlocking so many new features, the number of monsters one could choose to fight had also increased, resulting in a much wider variety of options.

"...That’s amazing, Chika. With all these features, it looks like you could have fun with it in all sorts of ways."

"Right? I worked hard because I wanted to have fun with my big sister."

Shiori exclaimed in admiration upon seeing the liberated state of the function, which could be said to be the culmination of Chika’s efforts. Chika responded to her voice with a satisfied smile.

"So... how should we try it, big sister? I’ve tried it out briefly, but you can really set it up to simulate all sorts of different situations."

"Okay. In that case... how should we go about doing it?"

Faced with the new features, Shiori and Chika discussed various scenarios and situations in which they would enjoy themselves. And then a few minutes later, having decided on the scenario in which they would conduct their duel, the two quickly adjusted the settings and began their battle.

Suddenly, a magic circle for teleportation appeared at their feet, and they were transported to the dueling field they had set up.

"Uh..."

"Yeah..."

The dueling field could be summed up in one word: ruins. The area was rectangular, measuring two hundred meters wide and five hundred meters long. The ceiling was also at a height of about one hundred meters. The vast, desolate ruins boasted a straight stone pavement on the floor, with pillars placed at equal intervals. That was the duel field that Shiori and Chika had set up for this occasion.

"Yeah, just as we decided."

"Yes. And..."

Shiori and Chika nodded with satisfaction, pleased that the dueling field had turned out exactly as they had envisioned. They then began to gaze at the monsters that appeared in the dueling field.

"Gugyagya...!"

"Gugya, Gugya Gugya!"

"Gya gya, gya!"

The first thing that appeared in front of them was a group of goblins. However, the number was quite large—at least several dozen. Some of the goblins were carrying staffs, suggesting that other types of goblins were mixed in as well.

"Squeak! Squeak squeak!"

"Screech! Screech!"

"Squeak, squeak!"

Next, they saw pink bats near the ceiling. This bat was called the "aphrodisiac bat." This bat possessed the ability to make the area it bit intensely hot and aroused, ultimately causing its victim to go into heat. Their number easily exceeded several dozen.

"Shururuu"

"Shur, Lulu"

"Shhh"

Next, on either side, were pink snakes. This snake was called the "aphrodisiac snake," and like the aphrodisiac bat, it was a monster that possessed the ability to arouse its victims and drive them into heat at the site of their bite. Their number was also several dozen or more.

"Clap, clap!"

"Kappa-pa, stop!"

"Cop pop pop!"

And then came the appearance of a "kappa" (water goblin). The kappa watched Shiori and Chika with an excited expression, its arm fins ready to move at any moment. The number was... several dozen or more.

"Grrrr..."

"Grrr, grrr!"

"Grrrr...!"

And everywhere on the dueling field were gray wolves, "Glenwolves." They slowly walked around the dueling field, their eyes fixed on Shiori and Chika with excitement. And their number was, well, several dozen or more.

"Hehe... This is amazing... ♡"

"Yeah... This kind of situation couldn’t happen anywhere else... ♡"

Yes. This was the setting that Shiori and Chika had decided to use this time. It involved battling a large number of various types of monsters—a practice known as a "monster house."

"This is the first time I’ve been surrounded by so many monsters..." 𝘧𝑟𝑒𝑒𝘸𝘦𝘣𝑛𝑜𝘷𝑒𝓁.𝘤𝘰𝓂

"It’s amazing that they can do something like this..."

The total number of monsters currently on this dueling field was five hundred. There were several types: goblins, aphrodisiac bats, aphrodisiac snakes, kappa, and glenwolves. One hundred of each had appeared. Shiori and Chika shivered with excitement and fear at the sight they were about to witness—something they would almost never see just by doing a normal quest.

"Alright, Chika... let’s give it our all."

"Okay... let’s do it, big sister."

The victory condition for this duel field involved defeating a predetermined number of monsters. The number was... one thousand. Yes, they had to defeat all the monsters that had appeared so far, and on top of that, they also had to defeat another five hundred monsters that kept appearing—a number that could be described as reckless. However, without such a reckless premise, the experience the two were about to have would not have been possible.

After all, what the two of them wanted to experience from now on was this: seriously fight the monsters with all their heart. Even if humiliated in battle, keep fighting. Fight and fight and fight to the very end, and despite their efforts, be overpowered by a large number of monsters and brutally violated. In order to experience such a humiliating and complete defeat, the two of them had created this reckless situation.

"Duel begins"

"Alright... Let’s go, Chika!"

"Yes! Let’s go, big sister!"

As soon as the monster appearances subsided, Shiori and Chika saw the displayed information and immediately charged forward toward the five hundred monsters.