Naturally, ordinary people could not see the existence of the "Curtain," and the sounds occurring inside would not be transmitted out.
At the same time, the Curtain itself had certain defensive capabilities and could prevent Cursed Spirits inside from escaping. However, this thing didn't have much combat power. Although it didn't require high strength from the caster, if the proficiency wasn't high, casting it was quite cumbersome and required consuming a lot of materials.
Usually, support-type supernatural beings would learn it. After each use of the Curtain, they would go to the higher-ups of the corresponding forces in the Inner World to reimburse the costs in this regard.
Because Miyauchi Hikage needed to study sealing techniques, he also spent some effort on barriers and asked Nanami Kento many questions about this.
Considering the special situation of Beika Town, Nanami Kento specifically came over to set up some barriers around his Western-style house, which seemed to have been discovered by the Detective Boys in the process.
Later, Miyauchi Hikage also studied the knowledge of barrier techniques himself, but his talent in this area might not be as good as Jerry and Shadow Yuuko.
After tossing around for a while and realizing he wasn't cut out for this, he handed over these research tasks to these two guys and studied soul data conversion technology alone in the basement of the Western-style house.
Looking at the Curtain that wrapped the entire school in front of him now, he could only say that people sent by Jujutsu High to be stationed and patrol locally, even if they were Grade 3 sorcerers, indeed had some unique skills.
In the eyes of people with supernatural powers, the existence of the Curtain was actually quite obvious.
From the outside, it looked like a large box shrouding the entire school. If one looked closely, one could also see a somewhat gray boundary line.
However, the situation inside this gray boundary line could not be seen directly.
None of the people present were ordinary people. Sakurajima Mai was in the period of ability rampage and could already see some things she couldn't see before. Shinomiya Kaguya, the weakest in strength, had also used 5 reading value points to unlock the Elementary Spirit Sight earlier this month.
Speaking of which, these Spirit Sight that needed to be exchanged with reading value were not that simple.
It seemed to just give people the ability to see those low-level vengeful spirits, but actually, it could also give people a certain medium constitution. Even if one couldn't practice spiritual power or cursed energy before, after redeeming these Elementary Spirit Sight, one could obtain the basic qualification to practice cursed energy.
Of course, this kind of constitution was completely at the bottom in the Inner World, only counting as an admission ticket, and was not on the same level as Miyauchi Hikage's Pure Yang Body, a cultivation constitution obtained right from the start.
But even so, the consumption of 5 reading value points could definitely be considered cheap and good. The girls in the group expressed that this was probably the novice gift package given by the diary.
After all, apart from Spirit Sight, the diary rarely popped up any special abilities that could be actively redeemed. Usually, the function of reading value was used for danger warning and improving skill proficiency and physical fitness.
No one noticed this matter at first. It was only this month, with the appearance of the commission board, that the reading value in the hands of these girls wasn't so tight.
Then several girls wanted to try to solve those lowest-level primary spirit commissions to get more reading value. So after hesitating for a while, they redeemed the Spirit Sight ability. Afterward, they discovered that the cursed energy they couldn't cultivate before could now be cultivated smoothly.
Up to now, the girls in the group had basically all redeemed the Elementary Spirit Sight, and were still looking forward to whether higher-level exchangeable Spirit Sight would appear in the future.
If higher-level Spirit Sight could give people a better constitution, it was believed that many people in the group would find ways to save enough reading value to make their talents better.
Anyway, this thing could be turned off by oneself, unlike Yotsuya Miko who couldn't turn it off after opening it.
It was just that every time those girls tried this, they would receive an "insufficient authority" reminder from the diary, making them feel regretful.
"Is this a barrier?" Sakurajima Mai looked at the gray boundary in front of her and exclaimed.
Obviously, it was the place where she had attended school for two years, but she didn't expect that this place had always hidden secrets she didn't know.
Or rather, the vast majority of students wouldn't think that in order to prevent their negative emotions from gathering to form Cursed Spirits, Cursed Objects would be actively placed in many schools to deter those Cursed Spirits.
Of course, let alone students, even the principals and school board members of most schools probably wouldn't know about this kind of thing. These Cursed Objects were secretly placed by specialized departments of the Inner World. The larger the scale of the school and the more students there were, the higher the grade of the Cursed Object needed for suppression would be.
These Cursed Objects were generally hidden in secret corners that wouldn't be noticed, and the seal status would be checked once every six months on average.
Generally speaking, schools with fewer than a hundred people didn't need to specially place Cursed Objects, or those low-grade Cursed Objects wouldn't be of much use. Schools with fewer than a thousand people needed to place some Grade 2 or even Grade 1 Cursed Objects to deter those Cursed Spirits.
Large high schools with more than a thousand people either used Special Grade 1 Cursed Objects or directly used special-grade Cursed Objects.
Like Toyogasaki Academy, what was sealed was a Grade 1 Cursed Object, placed in the core of a tree on the playground.
Miyauchi Hikage had discovered that thing long ago, but he had never paid attention to it.
After all, the school atmosphere of Toyogasaki was very free, and it was a new school. The accumulation of negative emotions among students wasn't high. Even if some Cursed Spirits were generated occasionally, they were probably about Grade 3 or 4 strength, so there was no need to care at all.
In comparison, Miyauchi Hikage had visited Advanced Nurturing High School and Hyakkaou Private Academy. These two schools were purely Gu raising grounds (breeding grounds for poison/curses). The resentment inside the schools looked like it was going to reach the sky.
If it weren't for the special-grade Cursed Objects suppressing them there, and specialized priests patrolling around regularly, these schools would probably produce several Grade 2 or even Grade 1 Cursed Spirits a month.
However, he heard that the locations of those two schools were also one of the gathering places of resentment in Tokyo, only on a smaller scale than Beika Town. He didn't know who made the decision to build high schools in those two places.
The deviation value of Minegahara High School was not bad, but it was just at the level of a normal prefectural high school, not comparable to truly famous schools.
Sakurajima Mai chose this high school because it was low-key enough for her.
However, as the origin of the Rascal Does Not Dream series story, as the school where the protagonist was, many special things did happen in this school.
First, similar to the development of Suzumiya Haruhi, people from the future guided the past protagonist to choose the high school to attend. Then, three cases of Puberty Syndrome appeared in Minegahara High School one after another.
Sakurajima Mai who lost her presence, Koga Tomoe who could simulate the future and even pull others into her simulations, and Futaba Rio who split her rationality and sensibility into two people.
Until the protagonist entered university, Minegahara High School was a very important story setting. It really made people doubt if there was something wrong with the feng shui of this place.
Miyauchi Hikage opened the Eye of Destiny outside the Curtain and looked a few times, but found nothing special for the time being.
"This afternoon, when I was checking the seal status of the Cursed Object in Minegahara High School, I was attacked by a Cursed Spirit. However, the other party's target should be that Grade 1 Cursed Object, so after I escaped, it didn't pursue me, but stayed in the school without leaving. Perhaps that guy has already swallowed that Cursed Object now and is digesting it."
The Grade 3 sorcerer, who looked a bit wretched, explained the possible situation inside the school to Miyauchi Hikage.
The female sorcerer looked at Miyauchi Hikage: "If that Grade 2 Cursed Spirit really swallowed the Cursed Object, its strength will probably increase a lot. Even if you have Grade 1 strength, it's best to be careful."
On the side, Yotsuya Miko was also explaining the meaning of the existence of Cursed Objects to the somewhat puzzled Sakurajima Mai.
Relying on the aura of the Cursed Object to deter those Cursed Spirits so that there wouldn't be too many dirty things in the school.
But at the same time, it was also quenching thirst with poison in a sense. After all, the Cursed Object itself was also an evil thing, and it might suffer backlash after a long time.
And now, the Cursed Object of Minegahara High School seemed to have attracted a greedy Grade 2 Cursed Spirit.
Miyauchi Hikage nodded to the female sorcerer: "You will command later. I have no problem."
At most, it would evolve into a Grade 1 Cursed Spirit, which really didn't need him to worry too much.
He cared more about why so many people with supernatural awakening appeared in this school.
Seeing that Miyauchi Hikage still had that calm look, the female sorcerer nodded and warned the girls who came along not to enter the barrier to avoid any danger.
Regarding this reminder, none of the girls had any objections.
After all, their strength was indeed insufficient, and combat experience was even scarcer. Entering the barrier was obviously dragging others down. Naturally, these girls didn't want to become burdens.
"It won't take long. After I solve that Cursed Spirit, I'll take you in to check the situation." Miyauchi Hikage nodded to Sakurajima Mai.
Shinomiya Kaguya on the side couldn't help but think of the night before yesterday.
At that time, Miyauchi Hikage also said the same thing.
Holding a Nichirin Blade, he went out and came back in less than five minutes. He even changed into a Bandaged Man costume and set up the criminal methods used in the case back then.
Although Miyauchi Hikage didn't mention at all what he did in those five minutes, Shinomiya Kaguya could feel something more or less, and felt satisfied in her heart for having some secrets between her and Miyauchi Hikage that they needed to keep together.
And now Miyauchi Hikage said similar words to Sakurajima Mai, which couldn't help but make her a little jealous.