People in Detective Conan are going crazy over the comments section.

"What? You're saying that Ms. Kadokawa Saori is currently missing?!"

After a period of sailing, the group finally arrived at the island and went to the mansion on the island to search for the client's whereabouts.

"Yes, it seems she didn't show up for work three days ago."

Strangely, the staff on the island told them that Kazuya Saori had been missing for several days.

“Counting back three days from now, that’s exactly when that letter arrived at home.” Hattori Heiji began to deduce, trying to find any connection between them.

"But the neighbors are all wondering if she took a boat to the mainland for a trip..."

He was interrupted halfway through his sentence by a voice from behind, "Mr. Kobayashi, it's time to go."

"Oh! Here I come, here I come. Sorry, I still have to go to the island to prepare for the celebration."

"What kind of celebration is this?" Kogoro Mouri was a little confused.

"Well, today is the day of our island's annual dugong festival. If you want to know anything else, you can go to the local products shop on the corner where Saori works and ask the owner."

----------------------------------

After that gentleman left, Asakawa Yu and the others started strolling around the streets.

"Besides the mermaid amulet, there's also a mermaid suspender clip. This is the first time I've ever seen dugong pies like this. This island really is closely related to mermaids," Xiaolan said, holding the pendant in her hand.

"Hey, what's a dugong?" Hearing Ran mention dugongs, Kazuha asked Hattori Heiji, who was standing nearby, because he didn't know what a dugong was.

"Oh, so it's what's commonly known as a mermaid. It's a type of mammal that lives on the seabed. In fact, there have been traces of them in southern Japan in the past. Since ancient times, dugong meat has been used as an elixir of immortality."

Hattori explained this knowledge to Kazuha in detail.

"Dugong's Arrow?" Kogoro Mouri asked the shopkeeper another question.

"Yes, that's a talisman for immortality. Every year at the annual Dugong Festival, three Dugong Arrows are given to the villagers. Saori accidentally lost the arrow she received at last year's festival, so she's been very scared for a week now, afraid that the mermaid will come after her for revenge."

"Huh? There are no mermaids in this world." Kogoro Mouri found it absurd to hear that the reason for their disappearance was something like that.

"There are indeed mermaids in the world."

Just then, an unfamiliar voice came from behind them, causing everyone to turn around.

"It's you, Naoko." It turned out she was someone the shop owner knew.

"Because there are real cases in the world where people have gained immortality by eating mermaid flesh, and the dugong arrow made from the hair that the longevity woman grew using her mental power can make anyone's dream of immortality come true."

"It's only natural that she would flee this island out of fear of the mermaid's revenge after losing such an important arrow," the woman named Naoko said before leaving on her own.

"Who is she?"

“Naoko is Saori’s childhood friend,” the shopkeeper answered Mori’s question.

"Then the longevity woman she just mentioned is..." Hattori Heiji grasped the key point of what the woman had just said.

"The main character of today's celebration, and also the symbol of our island, is that old lady from Shimabukuro."

"So how old is this old lady actually?"

"Well..." This question stumped the shop assistant. "There are actually many people who say she's a hundred or two hundred years old. If you want to know, I suggest you go to the shrine on the island where the festival is held."

"shrine?"

"Grandma Shimabukuro's great-granddaughter, Kimie, grew up with Saori, so she should be there too."

"So how did we end up like a ball?"

Heiji Hattori was speechless upon hearing that they were going to another place.

After saying goodbye to the shopkeeper, the group immediately set off for the shrine, hoping to obtain some information there.

-------------------------------------

"So how could my great-grandmother be two hundred years old? Actually, my great-grandmother is exactly 130 years old this year. You can find out by checking her household registration."

Upon arriving at the shrine, they were greeted by the shrine maiden, whose name was Shimabukuro Kimie, who was discussing her grandmother's affairs with everyone.

"She just lived a little longer than the average person, yet she caused such a commotion." Shimabukuro Kimie didn't seem to care much about the fact that her great-grandmother had lived so long.

But others don't see it that way.

"Of course."

"This should already be in the Guinness World Records."

Ran and Akemi Miyano, who were standing nearby, were both shocked.

"So, may I ask where your great-grandmother is now?"

"Oh, she's currently in her room praying fervently for the Dugong Arrow that will be delivered tonight."

"Hey, let me ask you something, did your great-grandmother really eat mermaid flesh?"

Finally, Kogoro Mouri asked the question that had been troubling him for so long.

But even so, after hearing Mori ask that question, Shimabukuro Kimie reacted as if she had heard something outrageous, first shocked, and then started laughing.

[Ah Wei is dead, but this girl's smile is so beautiful!]

[Feels like an adult version of Ayumi]

[Strategist! How do you pursue someone like this?]

"Hahaha, it seems there are no mermaids in this world at all." After laughing, Shimabukuro Kimie began to speak to everyone.

"what?"

"Those are all made up."

"But...but, that dugong arrow isn't..." Kogoro Mouri still didn't understand this.

"Actually, that arrow used to represent a cursed arrow that had been enchanted with an exorcism spell. But the people on the island got involved with mermaids and changed it to a dugong that lives in the sea. This is what my late mother told me."

"So your mother has passed away." Xiaolan felt very sad upon hearing that the young woman in front of her had lost her mother.

When they learned that the girl's family members had also perished at sea, Xiaolan and the others immediately became anxious. "Your family members all died at sea. There must be some reason for this."

Unexpectedly, after hearing this, Shimabukuro Kimie appeared very optimistic, "There's no reason at all. I also took a boat to the mainland with Saori before, but nothing happened."

"What?! You're on a boat with Saori?" Upon hearing the name of their long-lost client, Mori and the others immediately perked up.