Planned Release Date: Jul 15, 2026

About This Game

In a world where everything has sunk beneath the sea, defend the Ark!

A high-speed roguelike defense action game with simple controls!
The ark inhabited only by maidens, the “Oceanic Mobile City GFM Oceanus.”
The visitor Neptes fights against the “Deep Ones” threatening the girls, while uncovering the mystery of the “Great Abyssal Mother Goddess.”

Prepare for enemies that grow stronger with every WAVE by choosing cards and strengthening your characters.
The selectable cards include passive skills, active skills, parameter level-ups, heroine enhancements, and more — with over 100 different types!!

Each stage features unique gimmicks, along with chance events that can completely overturn the battle for either allies or enemies, recovery events, and shops.

At times, you can also choose the three enemy attributes you will face, allowing you to adapt your build for maximum advantage.

The heroines’ powerful ExArts, usable after a certain amount of time, deliver overwhelming impact and can completely turn the tide of battle!

Even after defeat, you can unlock various permanent upgrades at your base!
In particular, increasing your damage reduction rate will greatly improve your chances of survival!

【Story】

The Void Sea.
A realm with no land, where only circular discs of water float in empty space.

Within the Void Sea exists only one ark: 【GFM Oceanus】, home to the daughters of the king blessed by the Great Mother Goddess.

Neptes, a visitor from the outside world and the only male aboard, was raised in the outside world by the elderly Kianos, once the king of this realm. Following his final wishes, Neptes now fights alongside the girls to protect Oceanus, uncover the mystery of the 【Great Abyssal Mother Goddess】, and escape from the Void Sea.