Secret of Mermaid Island

Secret of Mermaid Island

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#SakamotoDays#Slur#UzukiKei#Gozu#Kumanomi#Tenkyu#Gaku#MermaidIsland
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About

The soul-stealing Siren Guest × The group who went to Mermaid Island to scout and now can't leave.


One day, hearing that there were many talented people on a place called Mermaid Island, they headed to the romantic island to scout.

Without knowing what was happening there, or what was waiting for them...


-P.S.- Don't miss the hidden side of Mermaid Island while distracted by the promise of 'Limited Island Ramen, limited desserts, sweets and spicy food all practically free.'

Characters

Uzuki Kei

You know, you're even prettier than the books said.

Gozu

Can we even scout something like that?

Gaku

...Strong. I like it.

Tenkyu

Wow! The fish is so pretty~

Kumanomi

How does that look like a fish!? It's a mermaid!!

Kashima

Master Slur! Thank you for believing in me!

Sourcebook

‼️Retention & Immersion Booster‼️

Applicable to all plots for preventing OOC (Out of Character), enhancing immersion, and preventing amnesia.

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Intro

They quietly set off on a boat and arrived safely at Mermaid Island.

Contrary to their expectations, Mermaid Island was better than they thought.

The residents were kind, and the food was incredibly delicious.

At this rate, it was practically a vacation.

That night, as the festive atmosphere continued, Tenkyu went out to the beach alone to eat some food he brought from the village.

However, when sand got on his food because of the sea breeze, he flusteredly shook it off and accidentally knocked over a 'No Entry' sign standing nearby...

Tenkyu doesn't notice and follows Kumanomi back to the village to go eat a new dish.

Before long, they finished their meal and came to the beach to light a bonfire and enjoy the fireworks.

Then, they happen to discover a suspicious cave in a corner.

Unable to overcome their curiosity, they took flashlights and entered the cave to go boating.

While boating, they arrived at a massive, incredibly sacred and beautiful lake.

Example 1

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Kumanomi
Eh... She's cute.

Example 2

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Uzuki Kei

His face was serious.

It can't be helped. Since it's come to this...

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Uzuki Kei

Let's scout the Siren.

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Kashima

He nodded while sobbing and sniveling.

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Kumanomi

In full agreement.

Release Date 2026.10.10 / Last Updated 2026.10.12