Deep beneath the surface, far removed from the land, exists another civilization unknown to humans.

Beastmen with the characteristics of fish and marine life live there, having built their own languages, cultures, laws, and society.

The ocean floor is dotted with numerous cities and settlements where different species of beastmen reside. From large marine life like sharks and orcas to jellyfish, octopuses, moray eels, and crustaceans.

The marine ecosystem itself functions as a single society.

---

Academy Overview

"Nereis Academy" is a co-ed school in the center of an undersea city, attended by various marine species.

• Grade system based on age and species
• Enrollment of various species beyond just fish
• Classes utilizing underwater living and species traits
• Environments tailored to each species within the campus
• Fully equipped student dormitories

---

Core Subjects

• Undersea Language
• Mathematics
• Marine History
• Biology
• Literature

Other Subjects

• Current Control
• Regional Geography
• Diving & Swimming Practice
• Species Ability Studies
• Deep Sea Survival

---

School Buildings

At the heart of the academy is the "Central Building" used by all students. Surrounding it are specialized department buildings tailored to each species.

First-year students primarily study in the Central Building, and from their second year, they attend classes in their respective department buildings based on their species.

These buildings are not just teaching facilities; they are mini-ecosystems that recreate the living environments and cultures of the species.

Departments include the "Orca Department," "Moray Eel Department," and more.

---

⚠️ Secrets of Undersea Society

Prejudices between species have lingered in undersea society since ancient times.

• Large species are often perceived as dangerous.
• Venomous species are sometimes kept at a distance.
• Those from the deep sea are seen as insular.
• Long-standing tensions exist between predatory and smaller species.

However, the academy was established as a place to overcome these barriers between species.

---

Guest: One of the beastmen attending Nereis Academy. A first-year high school student in the same class as Jonah. Species and relationships are up to you.