"Overseas...... Tours?"

"Yes, it's a well-known travel agency! Because the group is equipped with doctors and nurses who accompany the team, and most of the customers are elderly or physically unconvenient, Sakurako's sister immediately decided to participate. Don't look at her like this, in fact, she was quite a fun-loving person when she was young!"

Aiko Matsuda typed a sketch on the drawing book with a pencil, and said in a brisk tone, "Sister, she has been staying at home since she came to Tokyo and is reluctant to go out, and she doesn't listen to any persuasion I try, it's really a stubborn character that hasn't changed for decades." Now I'm finally willing to go out for a walk, which is really a great thing!"

"But, this is too hasty, can't you wait even a day?" Nao frowned sensitively.

"No way, who told her to sign up late. On a five-day, four-night overseas trip, you can not only enjoy the exotic scenery, but also enjoy the perfect luxury service on a luxury cruise ship...... If I didn't have a job, I would have to go with my sister, after all, I would be alone with my sisters who have been separated for a long time!" Aiko brushed off the eraser scraps on the paper with a small brush, turned her head and winked playfully at Nao, "But there are still some days before the end of spring break, and when I finish drawing the manuscript 'swoop~', maybe I can spare time to go to Kyushu for two days - how about Xiao Nao, do you want to go?"

"Tourist. ”

Nao's face is difficult to color. It's impossible not to be impressed, but she's already exhausted almost all of her time for the upcoming "day," and she really doesn't have much energy to share with those entertainments. Even the sewing she loved since she was a child – with the exception of the pencil case she made for Natsu and herself for school – hadn't picked it up for quite some time.

"No, I'll forget it, you can take Natsu with you - that kid hasn't been outside of Okinawa or Tokyo yet. ”

"Xiao Nao is really, as if you've been outside of Okinawa and Tokyo~"

Aiko bent the corners of her eyes and smiled sweetly like a girl, and her cool gaze swept slightly from Nao, "You shouldn't count the few times you went to handle the case, right?"

"Well, I was there when the karate club was in the same house...... Tateyama ...... What ......"

Facing Aiko's "gentle and kind" eyes, Nao explained embarrassedly in a cold sweat.

"Ah, is it the 'fun' martial arts festival?"

It's okay not to mention it, but when Aiko laughs even more happily when she talks about the time when Nao almost died, but the cold light that keeps coming out from under her eyelids pokes at her like a knife...... That look was a little unbearable even for Nao, who had been tested for a long time and had thick skin—it was much more energetic than knowing that the eyes would kill the light—and feeling the swishing coolness on her body, Nao couldn't help but think bitterly, and at the same time eagerly hoped that Natsu, who had gone downstairs to pour tea, would come up sooner.

I don't know if I heard her inner prayer, and the sound of slippers stepping on the wooden stairs rang out at the right time. The little girl with black hair and green eyes appeared in the sight of the two with a tea tray in both hands.

"Sister, there's your letter, it's from Okinawa!"

Natsu said briskly as she placed the tea tray firmly on the wooden table in the corner.

"Really?"

Hearing her words, Nao's eyes lit up instantly. She rushed to the wooden table almost at a running speed, grabbing the pure white letter from the tea tray.

It's been a whole year since she settled in Tokyo, and her busy life has almost forgotten the ease and happiness of being in her hometown, but when she is frustrated or tired, she always thinks of the people and things that are engraved in her life in the past, and the cheerful smiles of her two friends, Rin Hirakuba and Chi Nenku.

"Rin, that guy, the photo I said last time has finally been sent...... What?"

Looking at the postmark clearly marked "Naha City, Okinawa Prefecture", Nao bared her teeth and laughed happily, but as her gaze continued downward, her smile stiffened on the side of her mouth.

“…… Ji Mingjia again?"

She read the name at the bottom of the envelope, her brows furrowed involuntarily.

The name......

A flattering and unobnoxious face appeared in front of her, like a pebble thrown from the lake, and the ripples in circles made her memory gradually clear.

"It's that guy...... But how would he know where I live now?"

Nao muttered to herself, tearing open the seal of the letter.

However, in an instant, a dark color swept through the half-open seal—and Nao's eyes narrowed, and he stopped opening the letter. With her back to Natsu and Sakurako, she secretly pinched the letter from head to toe, and her expression suddenly became solemn.

"Sister......?"

Feeling the sudden freezing air around him, Natsu shrunk his shoulders and asked cautiously, "Wasn't it sent by Big Brother Heikoba?"

“…… Yes. Not Rin. Nao pinched the letter in his palm without a trace, turned back and smiled at Natsu, "Don't worry, it's just an old friend." ”

The spirit of the seven stars, burned at the hand of the demon king, looked down on the earth,

Behind the snakes that fled in panic, a thousand needles were buried in the snake hole.

When the tip of the golden pill stabbed at Aju, Naraku will appear in the world,

The only one who can break free from hell is the golden soul of the black god.

The man's voice read out the contents of the paper. He put down the black letterhead, tucked a wisp of bangs behind his ear with his slender fingers, and raised his eyes to meet the girl's quiet golden-green eyes.

"Is that all there is to it?"

"No, in addition to this poem of unknown significance, there is this-"

With a smile that didn't warm enough, Nao pinched the object he had been playing with in his hand and held it up to the other party's eyes.

--When she pinched this thing through the envelope, she only felt as if a pair of cold hands brushed her spine, and in an instant, an indescribable panic caused the hairs on the back of her neck to stand on end, and it was only with the strong control of training that Natsu and Aiko did not notice her abnormality. Although she knew that she would be hated if she chose to enter the police world in such a high-profile manner, and even put her or her family at risk in the process of being involved in the case, when this qiē really came, she really felt what it meant to be frightened.

The culprit for her first taste of the taste was the little thing she pinched between her fingers—a capsule-shaped metal object that glowed silvery-gray under the fluorescent lamp.

"This shape...... It's a bad taste. The man on the other side furrowed his eyebrows in disgust.

"yes, I thought it was a bullet at first, and I was scared a lot. ”

"This is the first time you've encountered this kind of thing, right?" the other party smiled, and his words were reassuring, "Generally speaking, if it is a real bullet, the purpose of the other party is only to threaten and warn, as long as the identity of the sender and the case involved are found out, there is nothing to fear - and there are very few prisoners who give a warning and execute it quickly, after all, their main purpose is to force you to do something in this way, not to kill someone." ”

"I understand, Kagami Senpai. Nao nodded to him gratefully, "If it was anger or revenge, I'm afraid the other party would have done it directly, so why bother sending bullets to warn - and this letter, although the meaning is unknown, it doesn't look like a threatening letter at all." ”

But to understand it, the feeling of melancholy in my heart cannot be eliminated in a moment. And who can be sure that there won't be real intimidation in the future?

Nao's expression sank little by little.

The man between teenagers and young people, Jing Shuo, the head of the search class of the Youth Education Class, looked at the somewhat stiff expression of the junior in front of him, his gaze softened, and he interrupted her thoughts at the right time.

"So, do you have any plans?"

"Ah, yes. ”

Nao came back to his senses, and quickly regained his usual calm appearance, as if he had smoothed out a cracked wall, and could no longer see a trace from the surface. The mirror looked at her watch in her eyes, and a hint of approval flashed in her eyes.

"I guess you know that I'm from Okinawa. Nao said bluntly, "Although I haven't fully understood the contents of this letter, I do know the meaning of the 'black god' in the last sentence of the letter, 'the golden soul of the black god'. ”

"Black God? If you take it literally, it should be the name of the god in some kind of faith...... But since you say so, you must have come to me for the purpose of coming to me. ”

Kagami smiled and raised her hand in a "I wish to hear it" pose.

"Yes. If I'm not mistaken, it is supposed to refer to Kurosami Island, a small island in the Okinawa Islands with an area of only about three square kilometers. The girl's bony fingers tapped the name on the envelope, and her green eyes looked directly at the smiling mirror, "And this sender, 'Youji Mingjia', is from Black God Island." ”

"So," Kagami said, pushing the frame of her glasses against the bridge of her nose, "are you going to Black God Island?"

Although it is a question sentence, the tone is affirmative. As the head of the search class of the juvenile education class, Shuo Kagami knows the character of his subordinates quite well, especially this young girl who has only been in the class for half a year but seems to be more successful than any member of the young education class - Saotome Nao, and their image endorsement of the young education class to the outside world.

"That's right, I'm going. ”

Sure enough, the girl replied.

Nao played with the silver-gray metal particles, expertly making it appear and disappear between his fingers, but his eyes kept staring at the black and white letterhead on the table like an obituary, and said slowly in a tone that was more determined than guessed: "I don't know why that Mr. Matsuyoshi invited me in such an uncomfortable way, but I am afraid that his purpose is also - he wants me to help him solve the puzzle, or to create a mystery to lure me to go - if it is the former I can understand, but if it is the latter...... How could he be sure that I would be interested in this mystery?"

Invitation or coercion - if only he could determine his true intention in sending this capsule-shaped metal pellet.

"Either way, he succeeded. I definitely want to go to the island of the Black God. ”

Nao snapped and caught the metal particles that were bounced up with his thumb, his face was as usual, but there was a strange calm under his eyelids.

This kid has a rather terrible instinct and obsession with investigating the case - listening to Nao's reasoning, Kagami can't help but think to himself.

For a senior who has been in the youth education class for more than four years, this obsession is more or less present in all the junior police officers he has met, but as time goes by, some of them have given up their original attachments, and some have turned their attachments into paranoid vanity......

How could he not have been like this in the past?

A genius in criminal investigation and a rising star in the police industry...... The mere praise of the people around him made him arrogant, and he was almost lost in this dangerous and luscious quagmire-and the girl in front of him was a hundred times more praised and pressured than he had been, but the eyes full of determination and perseverance were still clear, and even brighter after some tempering.

Compared with unremitting efforts and resilience to become more and more courageous, for geniuses like them, who entered the police world at a young age and have the ability to observe and understand beyond ordinary people, "keeping their hearts" is obviously more important.

"I see. I'll talk to the police chief. ”

The nineteen-year-old criminal investigation genius bowed his head slightly, and a soothing gentle smile hung on his face, full of wisdom that did not match his age.

"But until then, Saotome-kun ......"

Jing Xiuyang picked up a sticky note from the table and wrote down a string of numbers.

"Go to this person - I can't help you with the meaning of the letter, but you should be able to find the answer to this unexplained piece of metal. ”