The next day Jin went to Beena's house alone. Reiko was going to give various instructions at Horaijima in the morning and join him in the afternoon.

First, they made 50 lighters together. The rest of the time was used to work out the concept of the water heater.

"How about we fill a tub with water and heat the water inside it?"

Bina suggested,

"Yes, that would be a good idea.

Jin agreed. We immediately made a prototype.

A bucket-shaped container was made of copper, and a magi device was assembled in the bottom to serve as a heater. I fit it into the wooden bucket, and voila!

"It's done!

Okay, let's fill it with water.

In Bina's house there is a well, which she uses for her magecraft. She draws water from the well and fills the container.

"Heat".

The magi-device is activated. In about five minutes, about 10 liters of water has become as hot as a bathtub.

"Yes!　It worked!

"Yes, it worked. What if we keep it running?

He kept it running and after about 10 minutes the water began to boil.

"It boils water too!"

Bina is pleased. But Hitoshi said,

"Well, considering the safety aspect and the consumption of magi stones, I think it would be better to stop the water at the same temperature as a bath.

"I see. I wonder about ....... Surely, there are other ways to boil water.

"It would be better if we could use magi crystals, but with magi stones, they run out as soon as they boil, don't they?"

Bina thought for a while,

"Yes, I've decided. Let's call it a <> and make sure it doesn't boil."

"Shall we develop the <> separately?"

"Okay."

So the two of them headed for the stall with the prototype of the "hot-water heater". Reiko was already waiting for them at the stall.

"Oh, Reiko, you're early today."

"Yes, my ...... brother. I've already purchased most of the things."

As yesterday and the day before, Beena was making popcorn and Jin was tending the store.

"Give me one of those lighters.

"Thank you very much.

Lighters are selling well again today. Meanwhile, Jin puts the prototype water heater he brought on the table.

"Oh?　What is it?"

A customer waiting for popcorn bites into this unfamiliar magical tool.

This is called a water heater. When you fill it with water and turn it on, it heats ......."

To the curious onlookers,

"The water inside turns into hot water."

After about five minutes, the water started to steam, and the onlookers were impressed.

"Hey, hey, can you boil water with this thing?

"It's not safe, it's only hot enough to stick your hand in.

"Hmm. But it can be used for washing dishes and so on.

"If you boil water heated with this in the kettle, you can save on firewood and so on.

"Oh, yes!　I might want one. Hey, how much?"

At this point Jin got stuck. He had not discussed the price with Bina. So he quickly calculated the cost in his head.

"Let me see... 200 dollars per unit.

"Well, that sounds like a good deal. But I don't have enough today.

"Oh, these are made to order, so if you order today, you can have them tomorrow.

"Oh, I see. I'll order one.

"Thank you very much."

I got an order for one right away. And then..,

"Oh, I'll order one too.

I want one too."

To my surprise, three units were sold. It seems to be more popular than I thought.

In the end, the popcorn and lighters were sold out. We also ordered 5 water heaters.

"I'm so happy. I can't thank you enough. I can't thank you enough.

Bina says with a smile on her face.

"Ha ha, I'm glad to be of service. But if we keep on like this, we'll run out of copper, right?　And wood for making vats.

"Oh, I see. ...... What should we do?　There is no place nearby where we can buy copper.

Bina looks worried. Seeing this, Jin said,

"Don't worry. I think we have enough left for tomorrow."

"Really?　How come Jin knows more about my workshop than I do?

"Inventory control is important too. You can't run out of materials while you're making something.

I know, I'll try my best. But I'm glad you're here Jin. I should praise the old me for thinking of asking you.

Bina smiles at that. Reiko, on the other hand, is silent. A figure appears in front of the three of them.

"Excuse me, you must be Beena, the Magi Craftsman.

It was a man dressed in luxurious, but not showy, clothing. He had short-cropped blond hair and must have been around 35 years old.

"Yes, I'm Beena. I am Beena.

The man lightly bobbed his head and said, "My name is Galana,

I am a servant of Count Galana and my name is Claude.

"Yes, yes."

The man who introduced himself as Claude was tall, slender, and fair-faced. Bina is a little nervous when such a man bows to her.

"Recently, I heard that a food called popcorn is popular in the castle, so my family bought some yesterday, and the boy who ate it said he wanted more.

Oh..."

"If possible, I would like to know how to make them. Of course, we would be very grateful.

"......"

Bina looked at Jin. Jin had originally taught her how to make popcorn. Jin noticed the meaning of her gaze and gave her a nod of affirmation.

"Yes, yes, that's fine."

Bina replied, to which Claude replied,

"Really?　Thank you very much!　Then, please come to the pavilion and visit ......."

Claude was about to say,

"Well, um, is it possible to bring Jin with you?"

He asked,

He said, "I only asked Bina-sama to come with me. ......"

She said, "I was told that you are the only one, Ms. Beena, so please visit . Then Bina said,

Then she said, "Well, I'm going to leave my luggage, please wait a moment.

Claude thought that was a good idea,

"Okay. Where do you live?　If you like, I can take you there in my carriage."

But he said,

"No, no, I'm close by. I'll be right back if you wait for me.

With these words, he started to run. Hitoshi and Reiko followed.

When Bina returned home, she turned to Jin,

"Jin, are you sure you want to do this?　Are you sure you want me to tell him?

"No, I don't mind. But since the guy seems to be an aristocrat, you should get what you're entitled to."

"Yeah. ......"

Beena, looking somewhat uneasy, confided that it was her first time to visit a nobleman's house and that she was worried that she might misbehave.

"Don't worry. They've asked me to come. Besides, it will be night soon and we can't leave my brother and sister behind, can we?

It's almost evening. Even though they are getting better little by little, it is not a good idea to leave them bedridden.

"So I'll stay until Bina comes back.

Jin said,

"Really?　I'm going to go." Beena gave up and said, "I'm going to go.

Bina gave up and went to the residence of Count Galana.