The lord's body shone brightly and then settled down.

"W-What is this?! I can talk, I can speak freely!”

“Father!"

"Oh, Shiro and Kayo, come over here!"

The parent and child shed tears and had an emotional reunion. Let's leave them alone for now.

"I'm sorry. Even though it was because of that guy, I didn't even notice you guys. I'm sorry.”

“It's okay, it's all his fault.”

“Father, it was Sasha who helped us."

Thanks to what Kayo said, he finally noticed us.

"Nice to meet you. I'm Sasha, and this child is called Rikka."

"I'm Kihachi. Did you guys release us from the curse of the Zombie House? Thank you very much. I've been observing adventurers who occasionally come here for the past few hundred years, so my way of speaking has changed."

At the very least, they're people from before the Edo period. I don't know how to talk like that at the time, so I don't know what to say.

"I'm glad we were released. We're investigating who created the Zombie House and why everyone turned into zombies."

"I see. But if that's the case, aren't there any clues scattered around the town?"

"At first, we planned to carefully search for clues, but we found out that by devising a certain magic, we could completely regain the self-awareness of the soul-infused zombies. We have regained the self-awareness of the old lady and her granddaughter at the dried goods store and heard the story here, so we know the basic history. However, we don't know the cause of the zombie outbreak or who created the Zombie House, so we thought it would be better to directly ask the boss, the lord, after regaining his self-awareness, and came here."

The lord's face is trembling. Well, there aren't many people who would directly ask the boss without following the rules of the Zombie House.

"Ahahaha, if the creator finds out, he'll be angry. You're completely ignoring the rules, after all. First, let me talk about the cause of the zombie outbreak. The earthquakes that occurred frequently since we teleported here are a precursor. The ground changed due to the earthquakes, and something came out from the bottom of the lake to the east of here."

"Something?"

“Yes, the creator said ‘It's a virus that I improved,’ didn’t he? We town residents use the water from that lake for our daily life. The virus dissolves in the lake's water, and people become infected with the virus by ingesting it. The incubation period of this virus is about a month, and when it develops, the person becomes a zombie, and the released soul becomes a plan to transport to the Evil King. Also, only when the people of this world take water, the virus develops in 3 days. The virus exists only in the water. Ideally, adventurers should deduce the truth from the clues and explain it to me to judge whether it is correct. If it is correct, they will be transported to the space leading to the third mission.”

I did it again, didn't I? No one has cleared it for 500 years. It's game over just by drinking water. How did the heroes 500 years ago clear it?

“I see. Do you know anything about the creator of the zombie house?”

As if remembering the creator of the zombie house, he tightly clenched her fists.

“--- I met him once after the abnormality occurred in the castle town. He smiled and talked about what was happening in this castle. At that time, I painfully realized that I was a small, useless existence. --- What I know is that he is a boy of about 13 years old, quite strong, and has companions. I wanted to know his whereabouts, but I couldn't. Oh, that boy, although he spoke in an unusually adult-like manner for his age, his mind was still that of a child. He did not understand how much sin he was committing. He talked to me as if it were just a child's play. Honestly, I was boiling with anger in my gut. And I was useless, too.”

“Yeah, I guess so. Kihei-san is the lord who protects this castle. He couldn't do anything just by watching the people in the castle town turn into zombies. He must have felt frustrated. A boy of about 13 years old, who has the magic power to create a zombie house, maybe an irregular existence like me. Who is he?”

“Did he use any unusual words?”

“Well, as far as I can remember, he used words like ‘game,’ ‘survival,’ and ‘biological disaster.’”

“I see.”

“Thank you. With just these three, we have a general idea of who the creator is.”

The creator is a former Japanese person of modern times, undoubtedly someone who was summoned from Japan to another world around the year 2000. I will find him and tear him apart. I will make him understand to the marrow of his bones how much sin he has committed.

"Oh! Can you really tell just from that? Amazing. What will happen to this space? I would like everything to be purified if possible."

"Of course, I will purify all the spaces related to the zombie house. However, I have comrades in the castle town, so I will bring them back here first. Is that alright?"

"Yes, of course! We'll be waiting for you."

"Until then, please relax with your family of three."

Saying that, we left the castle for a while.

---

We searched for Finn and found a splendid house there.

"Master, we were searching around the big houses and found a statue of a goddess in the courtyard of this house. It seems that zombies cannot enter the property."

I never expected such a big house to be used as lodgings for adventurers.

"Let's go to a spacious room. I will also tell you about the progress I have made."

We moved to a spacious room and I told them what had happened here.

"Wow, you can use magic through gems! And you can completely restore a zombie's ego just by imagining it, can you Iris?"

"That's impossible, it's such a high-level technique! Only Onee-sama can do it."

Is that so? I think you could do it Iris.

"Sasha-sama, if I may ask, did you enter the castle without searching for clues and completely restore the castle lord's ego, then hear the truth from the boss himself?"

"Oh, Jin summarized it succinctly!"

"That's right!"

"You completely disregarded the rules, didn't you? In the end, the creator sealed the zombie virus at the bottom of the lake and caused an earthquake to release the virus on the surface. They could have just spread it themselves if it was so troublesome."

Now, now, Jin, don't say such blunt things. After all, we were playing a game.

"Onee-sama, how are you going to purify the space itself?"

"I have thought about that as well. Fortunately, the castle lord has completely regained his ego and accurately remembers the details of the mission. He knew the coordinates of the first and third missions' spaces precisely. So, we'll use my beloved sword Murasame to slice through the space of the second mission, then connect each space with my magic and activate the Grudge Purify, a wide-ranging purification magic from outside the space."

"Oh, Onee-sama, that's totally cheating!"

"Oh, right! I see, magic is prohibited inside the space, but it wasn't forbidden outside the space!"

That's right, Finn.

"However, before we proceed with the purification, there is something I need to confirm."

"Sasha-sama, what is that something you need to confirm?"

Jin asked a question. Everyone looked at me.

"The Zombie House should be connected to the Marco Ruins, right?"

Everyone nodded.

"Probably, the Zombie House operates separately from the dungeon core of the Marco Ruins. And it would be a waste to destroy the Zombie House. So,

1. Fully understand the three spaces. Each space must be connected to the Zombie House's dungeon core.
2. Hack the Zombie House's dungeon core and rewrite the master to me. The current core is controlled by a boy around 13 years old. I'll cancel out his magic and inject my own.
3. Take over the Marco Ruins' dungeon core through the Zombie House's core.
4. Use 'Grudge Purify' to purify all the people and animals in the Zombie House.
5. Connect the Zombie House and my personal space with space-time magic. This will allow the unique skill 'Free Dream' to be used in the Zombie House and Marco Ruins.
6. If the creator of the Zombie House appears, lure them into the ruins and tear them apart.
7. Improve the Zombie House and Marco Ruins into a dungeon where no one dies.

That's about it."

When I finished speaking, everyone had their mouths wide open. Jin was the one who spoke up.

"Sasha-sama, is that really possible? And what is hacking?"

"It's possible. I'll invade the Zombie House's dungeon core with my magic. First, I'll cancel out the current master's magic, then analyze the dungeon core and rewrite the master to me. Hacking is when you enter without permission."

"Only Onee-sama can do it.”

“Yes, only my master can do it."

"If it succeeds, it will be a groundbreaking achievement. No one will die in the Marco Ruins from now on, and it can be applied to other ruins in the future."

"Yes, that's right. But it's only if it works."

After the discussion, we had lunch and headed to the castle immediately.

---

Upon arriving at the 4th floor of the castle, the lord of the castle, Shirou, and Kayo were playing happily like parent and child. I wonder if they were able to enjoy themselves a little.

"Oh, Sasha-neechan!”

“Sasha-san, are you ready?”

“Kayo, Shirou, I'm all set. Kihachi-san, let me explain what we're going to do first."

She explained the plan she had discussed earlier to Kihachi-san.

"I think the plan is wonderful, but is such an outlandish idea really possible? Adventurers up until now have just been proceeding normally."

"I'm Finn. If it's my master, anything is possible. Please believe in us."

"Okay, I understand. As for us, we have no one else to rely on but Sasha-san. Please help us."

"Understood. Well then, let's begin. First, Kihachi-san, let me use appraisal. “

“Oh, sure thing."

"Oh, right. From here on out, I'll be in a state of concentration for about three days and won't be able to move. It's okay for everyone else to play until it's finished. I've prepared three days' worth of dinner in advance and given it to Jin. Be sure not to eat all three days' worth in one day."

"During the time you can't move, I'll protect Sasha-sama."

"Yes, please do."

Using appraisal, Kihachi-san investigated the location of the teleportation in detail. Okay, there were spatial coordinates for the first, second, and third missions. All that was left was to search based on this space.

I took out my beloved sword, Shiden, activated the time-space attribute, and tore through space. I thrust Shiden into the torn space and searched for the spatial coordinates of the first and second missions based on the teleportation coordinates. They should be located nearby. I emitted my magic power like ultrasound waves. If there were special spaces like the first and second missions, they should bounce back. ------ Found it! Okay, first, let's connect it to this place.

Next, using my magic power, I grasped and analyzed the first, second, and third spaces, searched for the dungeon core of the zombie house, and began hacking.

---

From Jin's perspective:

It's been three days since Sasha-sama started concentrating, but there's been no sign of movement at all. Analyzing and connecting spaces together, finding the dungeon core, and then hacking it. Is such a thing really possible? No one has ever tried it before; it's the first attempt. It will consume a tremendous amount of magical power. Finn and the others seem to have finished purifying the zombie-like entities without self-awareness in the town below in these three days. Right now, Shirou, Koyo, and everyone else are playing together.

"Jin, I've just noticed a serious problem.”

“What problem?"

A serious problem? Did I forget to do something?

"If Sasha-sama's work takes more than three days, what are we going to do about our meals?"

Ah, I completely forgot about that.

"Well, I guess we'll be fine. (Probably)"

"Sasha-sama's meals are so delicious that if we miss even one day, we'll experience withdrawal symptoms."

"My cooking is hazardous, huh, Rikka!”

“Ah, Sasha-sama! Thank goodness we made it on time."

Did she really finish it in three days?

"Sasha-sama, how far have you progressed with your work?”

“Oh, that. I succeeded. But..."

Did a problem arise?

"Well, since I had both the magical power and the time, I got carried away and made both the Zombie House and the Marco Ruins mine. However, I've only finished rewriting the dungeon core so far, and I haven't made any improvements beyond that."

Wow! She was able to make that much progress in just three days!

---As expected of Sasha-sama.

Next, it seems that the purification of the Zombie House will finally begin.

=====================================

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