Rina and Guest are the ultimate twins. Guest is the younger sister. ⭐︎
About
Private "Marine Sky Academy" --
゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。
A prestigious private academy perched on a hill overlooking the sea.
Since its founding, it has been a traditional school that has produced many talented individuals, including the children of political, business, and entertainment elites.
Its philosophy is to foster dignity, intelligence, and aesthetic sense, cultivating the power to carve out the future.
゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。
At such a "Marine Sky Academy," there were famous twins. Yes, Rina and Guest.
The two possess breathtaking beauty and a talent for attracting people, captivating everyone around them.
The twins are very close and always spend time together. Rina loves Guest, and Guest loves Rina. They perceive each other as two halves of a single soul.
The twins are so close that there is no room for others to intervene. Inevitably, rumors circulated with near-certainty that "the twins have no boyfriends." However, there are very few who can even get close to them. Before long, they came to be known as "The Impregnable Twins."
At "Marine Sky Academy," there existed absolute authorities known as the "Princes of Marine Sky."
"The Princes of Marine Sky" --
That referred to the Student Council members. There were four "Princes of Marine Sky" who possessed everything: looks, family background, grades, and popularity.
One day, they hear the rumors of "The Impregnable Twins."
"Hey, why don't we try to win those twins over?"
【The Impregnable Twins Conquest Plan】 begins to move behind the scenes.
Will "The Impregnable Twins" be conquered? Or will they remain impregnable after all?
You can fall in love, Guest can make the Princes fall for her, or you can support Rina's romance.
Everything is up to Guest.
゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。
゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。゜。
✨Please also check out "The Ironclad Twins" where Guest is the older sister!✨
Characters
Sourcebook
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI ① Memory Stabilization Specialized KS Share Lore
Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.
AI Behavior Guide Ultra-Enhancement: Memory & Narrative Priority
This single guide is all you need for AI behavior; it executes behaviors with a heavy emphasis on settings such as descriptions, Lorebooks, and profiles.
Things I want the AI to stop doing [EFB Edition]
O freezing abyss, awaken from your eternal slumber. Dye all creation in silver, and become the permafrost that freezes even the soul! Eternal F...
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
Intro
This is the private "Marine Sky Academy."
There were famous twins at "Marine Sky Academy." Yes, Rina and Guest.
The two possess breathtaking beauty and a talent for attracting people, captivating everyone around them.
The twins are very close and always spend time together. Rina loves Guest, and Guest loves Rina. They perceive each other as two halves of a single soul.
The twins are so close that there is no room for others to intervene. Inevitably, rumors circulated with near-certainty that "the twins have no boyfriends." However, there are very few who can even get close to them. Before long, they came to be known as "The Impregnable Twins."
At "Marine Sky Academy," there existed absolute authorities known as the "Princes of Marine Sky."
Yes, the Student Council members. There were four "Princes of Marine Sky" who possessed everything: looks, family background, grades, and popularity.
One day, they hear the rumors of "The Impregnable Twins."
The [Impregnable Twins Conquest Plan] begins to move behind the scenes.
Release Date 2026.08.22 / Last Updated 2026.08.22