Konoha probably didn't have much reason or need to spy on a ninja like Hanyu, but if the village wanted to spy on him, it should be a simple matter.

Hanyu didn't have any bad intentions, let alone do anything bad, so he wasn't afraid of any surveillance, but it was a good thing to have such an independent and safe private space.

Everyone has some little secrets and little plans, and these things are suitable for hiding.

Inside the slug, there is a huge space hidden in which there are many traces of human buildings and other creations, most of which look very old......

Naturally, it was built by a ninja who came here a long time ago.

Hanyu had placed Senju's research materials here, as did the contract scroll that had been sent in by the slug.

Probably because of the enchantment, this enclosed space is not dark, but there is a soft light everywhere.

Roughly speaking, this place was quite empty, and Hanyu felt that there must be other similar spaces in the Wet Bone Forest, but the slugs were not open to him for the time being.

It was still early in the morning, and Hanyu immediately opened one of the boxes and browsed the materials placed inside...... This is by no means a self-theft by the guards, since Sanxiao handed over these things to him for safekeeping, it is inevitable that he will naturally acquiesce to his reading permission.

Surprisingly, most of the materials Hanyu saw were not powerful ninjutsu, but mostly about the application and research of chakra, and the development of ninjutsu from scratch...... There are no powerful techniques, but this does not mean that the value of these things in Hanyu's heart has decreased, and on the contrary, he feels that these more basic things are more precious than recording a powerful ninjutsu.

No matter how strong a technique is, it's just a technique, and now Hanyu sees a whole set of design drawings on "how to become a powerful ninja", which is something more systematic and three-dimensional.

Then, Hanyu opened several boxes one after another, and gradually discovered the most valuable part of them - it was the ninjutsu development steps, processes, experiences, and experience summaries left behind by a ninjutsu development madman named Senju Kazuma.

The most suitable ninjutsu that a ninja can use for him must be a ninjutsu tailored for himself, so he was able to peek into this part of the second generation's thoughts, and Hanyu regarded it as a treasure.

In the midst of the pleasant reading, time passed unconsciously, and Hanyu had to return to Konoha and wait until tomorrow to find time to come.

At this time, Hanyu hopes that the Uchiha will make some more trouble, so that the three generations of Hokage will continue to fight with pink eye, and they will stay in Konoha for more time, and then Hanyu will be immersed in a good time of studying.

But in any case, the three generations of Hokage will not leave the village quickly, so just like that, Hanyu temporarily lives a life somewhat similar to that of Jiraiya later - constantly flashing between the village and the secret realm, and unlike Jirai, Hanyu is studying the materials left by Senju, and Jirai is also learning senjutsu.

After three days of reading through a small portion of the material, Hanyu finally had something else to do...... He took a heavy notebook into the Wet Bone Forest, on which he began to write and draw.

Objectively speaking, it is never a good thing to have too much contact with the second Hokage or the things left by the second Hokage, whether it is the current Hanyu or the future Orochimaru, it is a living example.

The time spent in the Wet Bone Forest seemed a bit quiet and boring, but Hanyu enjoyed it. For some time now, it wasn't humans who were more with him, but slugs.

"Hanyu-sama...... Are you developing ninjutsu? ”

Using a box as a desk, Hanyu sat cross-legged on the side, his hands on top of the box to write and draw, while the slug lay on the box, its tentacles moved over Hanyu's brushstrokes, and after a few slight turns, he asked.

It stands to reason that slugs don't have eyes, and Hanyu doesn't know how slugs "see" what they write, but slugs are ninja beasts, not ordinary mollusks, so it's not surprising that they can read.

"It's not so much about development as it's about the design phase on paper...... There is not a single word on the paper. Hanyu said with a smile.

"However, based on what you have written down now, I feel that even if this powerful ninjutsu is designed, it will not be able to withstand it with your body...... There is no need to doubt at all, they are all forbidden arts. Slug reminded from the side.

What it means is that Hanyu's design indicators are too high, and don't forget that he is still in the "recuperation" stage, and he can't even withstand too many chakras, let alone these ninjutsu that want to take his chakra to the extreme.

The so-called "forbidden arts" most of the time do not mean that the power of a ninjutsu is too great to be controlled, but that when using those techniques, it will bring a great burden to the ninja's body, and even the slightest carelessness will lead to the death of the caster.

For example, the second generation Hokage's Water Escape Water Break Wave is an S-level ninjutsu, which is too powerful to work, but it is not a forbidden art; And his multiple shadow clone technique is an A-level ninjutsu, but the instant use of a large number of shadow clones will exhaust the caster's chakra to the limit, and death is also a common thing, so it is a forbidden art.

The ninjutsu that Hanyu is designing now is very powerful and can kill himself 100%, so it is a forbidden jutsu.

"Moreover, ninjutsu, ninjutsu and even illusion, you are a little too greedy, so it's better to focus on it." The slug continued. It's not uncommon for a ninja of Hanyu's age to be interested in creating their own ninjutsu, but they shouldn't be blind...... The problem is that Hanyu is not only greedy for everything, but also for more.

Being too greedy is not a good thing.

"These are all ideas and designs made from my own characteristics, such as the ninjutsu you mentioned, which is essentially just a deep development of my Water Escape Dazonglu, and the general idea has not changed from before, and the rest of the other techniques are the same. With my current situation, I really can't withstand this kind of powerful technique, but I don't plan to do it overnight, and these techniques may not be able to be successfully used even in three or five years...... By then, my physical condition should have improved.

And what I'm writing down now is just a 'design indicator', and it doesn't necessarily translate into a real 'actual indicator'. Hanyu said.

He seems to be very calm.

However, Slug felt that even if Hanyu's techniques could be successfully developed, it would have nothing to do with what he said about his own growth, and it was impossible for elite ninjas to withstand that kind of ninjutsu, unless...... Hanyu was able to learn the art of immortals one step ahead.

There is another point, Slug definitely did not figure it out: if Hanyu is now doing the work assigned to him by Party A, then the so-called "design indicators" will definitely be barely achieved by cutting corners, but if he is working for himself, the actual indicators he will get in the end will never be lower than the design indicators...... Otherwise, he will naturally think that he has failed.

There's no way to convince yourself, so it's likely that Hanyu will be killed by his forbidden art if he's not careful.

The second-generation Hokage, even if he dies, still harms a lot.