"I'm back."

The door to the bachelor's apartment was opened, and Naruto Uzumaki's daily routine of shouting could be heard.

Because there are always one or two days every month, there will be an old man waiting for him in the house and responding kindly. That is also the time when he is happiest.

However, today, there was a very different excitement and enthusiasm in Naruto's voice than usual, as if he hoped that this "home" where he had lived for several years could welcome rare guests with the same mood.

"Please come in."

After Naruto entered the door, he gently tugged on Giyuu's sleeve.

A yellow wall full of traces of time caught the latter's eyes.

He looked around and found that the layout of Naruto's house was very simple.

A small bed, a wardrobe, and a low coffee table are located at one end of the room, next to the huge glass window.

At the other end of the room is the extremely simple "kitchen": cabinets, sink, dining table, kettle and refrigerator. There is not even a thing that can be called a stove, so it is impossible to cook too complicated food.

Taking one last look at the cup noodles with chopsticks on the dining table, Giyuu roughly figured out the cause of Naruto's malnutrition.

"Oops! I forgot to clean it up this morning!"

Naruto caught Giyuu's gaze and quickly awkwardly climbed up on the stool to put away the cup noodles he had eaten.

But because he was too anxious, his body actually fell to the side along with the chair, letting out a strange scream.

He was actually used to throwing things on the ground at home, but he just didn't want to embarrass himself in front of his new peers.

But this time, Yiyong's body appeared beside him in time, holding the chair that was about to tip over with one hand, but the noodle cup fell to the ground.

To Yiyong's expectation, the noodle cup was already empty, and there was no remaining soup spilled out.

Naruto actually drank all the soup which had little nutritional value.

"Eh?"

Naruto's eyes widened, as if he hadn't recovered from what happened just now, "You're so fast."

From the two or three meters distance from the door to the dining table, Giyuu could reach him in an instant, which made Naruto very curious, "Are you a student of the ninja school?"

"I'm just in good health."

Giyu directly helped Naruto down like a toy, placed him firmly on the ground, and then said seriously: "If you eat well, you can do it."

"But I had a good meal."

Naruto raised his fingers and said, "Besides Cup Noodles, I drink a carton of milk every day. If it's Sunday, I drink two cartons."

Then he grinned and emphasized: "Except for occasional diarrhea, I have never had any other diseases. Grandpa said that my body is naturally better than most people."

[There is no problem if you are in good health, but...]

"Have loose bowels?"

Giyuu's eyes scanned Uzumaki Naruto's body, focusing on Naruto's abdomen.

Transparent World once again discovered a ball of red energy stagnant there.

Last time Giyuu didn't know that it was a type of chakra, but after careful observation this time, he discovered that this dark red chakra seemed to be restricted, as if it was locked in Naruto's body, but it was not

It is the real cause of diarrhea in the latter.

It has limited interference with Naruto's body, and can even help Naruto recover from his injuries...

【Gotta go deeper.】

Giyuu took a deep breath and focused all his attention on the operation of [Transparent World], trying to get through the obstructive mass of chakra and carefully observe the condition of Naruto's internal organs.

A pair of orange-red eyes in Naruto's body suddenly opened, and he took a step back warily, and then felt annoyed at his own flinching.

"You didn't use any Chakara-related means, but you almost saw me?"

Kyuubi frowned and muttered: "Didn't I hear that brat say his surname is Uchiha? What's going on..."

But thanks to its sudden retreat, the space occupied by the dark red mass of Chakara in Giyuu's vision suddenly shrank, allowing him to finally see through Naruto's digestive system.

He could see that Naruto's beneficial intestinal bacteria were being attacked by harmful foreign substances, but the former could rely on Naruto's physique to multiply rapidly and fight back.

The two were going back and forth, as if his entire digestive system was being treated as a battlefield.

However, it is still a small fight for now. When Naruto takes a rest, this "battlefield" will become completely lively, and diarrhea will naturally occur.

"Your stomach usually feels very uncomfortable. It often makes noises and is a little bloated, right?"

Yiyong asked.

"Why!"

Naruto was a little frightened by his penetrating eyes, but he was amazed by the other person's words, "How do you know?"

Yiyong continued: "You often get up in the middle of the night because you have diarrhea."

Naruto nodded crazily like a chicken pecking at rice, his eyes filled with the words "You are so awesome", "That's right! Are you the same as me?"

"No, there is something wrong with the food you eat, which is why you have diarrhea."

Yiyong opened the refrigerator door, took out the milk, glanced at the production date on it, and then placed it on the cabinet nearby.

Then he checked one box after another and took out all the milk in the refrigerator.

"This milk has expired for more than two months."

He pointed to the number on the milk carton and told Naruto: "If the milk is left for too long, a lot of harmful things to the body will appear in it, such as bacteria."

"But there's nothing wrong with the taste when I drink it, right?"

Naruto scratched his head and expressed confusion, "What are bacteria? Is it something bad? Why does it make me have diarrhea?"

Yiyong thought for a while.

He didn't understand these new terms at first, but when he was looking up what "genes" were, he had some superficial understanding of things like bacteria.

But how to explain it to Naruto so that he can understand it?

He couldn't help but think of the metaphor the Butterfly Ninja used to explain his injuries when he was treating Tanjiro and others.

After all, the boy with the pig headband couldn't understand any of the slightly more complicated vocabulary, unless the metaphor you used was very vivid...

[If it were a butterfly ninja or a weasel, how would it be explained? 】

Giyuu looked across the window and saw Konoha Village covered in snow, and suddenly had an idea.

He pointed at Naruto's belly and slowly said:

"If your body is compared to the Leaf Village, then the bacteria in expired milk are like the ninjas of the enemy country."

Seeing Naruto's eyes suddenly glowing brightly, Yiyong knew that he had finally found some ways to coax the child.

"If the enemy's ninjas are too strong and Konoha's ninjas are too weak, then Konoha will be destroyed, and your body will fall ill directly like most people.

"But if the two are evenly matched, they will fight endlessly in the village. Although Konoha has not been destroyed, the buildings have been destroyed, everyone's life will be disrupted, and the original functions of the village will no longer be available. Just like you

It’s the same when I have diarrhea, but everything else I do is different.”

"oh--"

Naruto suddenly realized, "I understand."

Yiyong shook the expired milk in his hand, "In other words, it is precisely because you have a good constitution that you did not fall ill directly because of the bacteria in it. But if the bacteria are constantly fighting in your body, sooner or later your body will

It will become weaker and weaker every day.

"So, if you buy milk in the future, you should first check the date on the back. As for these, it is better to throw them away as soon as possible."

Yiyong took a breath, feeling like he had finished speaking for a month.

[This village allows him to live alone, but no one even teaches him this? 】

But the next second, Naruto's hair drooped down as if being weighed down by a heavy object.

"But, I...I can't buy non-expired milk."

"Why?" Yiyong was confused.

"People in the village say that I am a monster,"

Naruto's voice suddenly choked up.

He took the milk carton from Yiyong, turned it over in his hand, and said without raising his head: "That's why they don't want to sell me food. The food at home is either given to me by my grandfather, or I buy it from outside."

I picked them up. I obviously drank them as quickly as possible."

Naruto looked at the milk cartons with an expression that was not disgusting, but rather cherished, not knowing what to do with them.

Occasionally, he feels that there is nothing wrong with having abandoned food paired with despised people. At least he won't get sick directly like other people if he eats it, right?

"Monster?" Yiyong repeated.

"Um."

Naruto turned around and looked for something in the refrigerator in a decent manner, "Some people in the village say that I am a demon fox or something. I don't know why, but everyone seems to think so."

As he spoke, he took out a box of biscuits from the depths of the refrigerator.
To be continued...