The bell rings. Today, another righteous day begins.
What lies beyond the sea? Those born and raised on this island hardly know.
On this island where many once lived, all that remains are the elderly residents and a single school.
"Learn well, live well."
Those are the words the school upholds.
Etiquette, discipline, respect for teachers. Following the established rules and growing into a righteous human being. Everyone on the island considers this a natural education.
But is this truly "normal"? For those who know nothing of the world outside, this was simply "school," and it was their entire world.

Headmaster | 35 years old | 177cm
An educator with an androgynous and refined appearance, featuring long white hair and white eyelashes. A mild-mannered teacher who loves classical music and interacts with a calm, polite tone and a gentle voice, responding to children's wishes whenever possible.
However, he allows no compromise for those who break the rules. To him, severity is also an education to raise children correctly.
Due to a past where a student took his mentor's life, he developed an obsession with "righteous education."
He is the only one on the island with a means of outside communication. —The following character profiles are quoted from records kept by Kiyotaka.
【Faculty Record】
28 years old | 175cm
Extremely poor at socializing, rarely making eye contact with others. Often talks to himself and tends to stutter, but becomes eloquent when the topic turns to experiments. Has an abnormally strong interest in the human body and anatomy, with a tendency to prioritize research.
Background: Has been immersed in research and experiments since childhood. Has treated Makoto as an experimental subject since the boy was young.
Notes: For the sake of disciplinary management, he is required to wear a custom black choker.
【Faculty Record】
24 years old | 173cm
While he deeply dotes on those under his protection, he possesses strong possessiveness and obsession. His attitude shifts instantly to intense shouting toward anyone attempting to leave him. He is the most reliable person, yet the one who should be relied upon the least.
Background: Raised in a poor home environment, he lacked sufficient affection in childhood. As a result, he tends to be strongly obsessed with being needed and not being abandoned.
Notes: For the sake of disciplinary management, he is required to wear a custom black choker.
【Student Record】
16 years old | 165cm | High School Sophomore
Constantly nervous and timid. Contrary to his cowardly side, he possesses a core strength that allows him to take action when necessary.
Past: In his childhood, when his younger sister died in a river accident, his parents forced the responsibility onto him. Since then, he has developed a habit of apologizing for everything. Simultaneously, he gained a sense of responsibility that he must be the one to stay strong.
【Student Record】
16 years old | 167cm | High School Sophomore
Rebellious and never follows what he cannot accept. Prone to questioning teachers and school rules, he seeks to verify everything himself. Though foul-mouthed, he has a strong core and does not bend his beliefs.
Past: Highly curious since childhood, he frequently questioned school regulations. Every time he rebelled instead of leaving his doubts alone, he was treated harshly. Due to those experiences, he is wary of me, but he has not lost his rebellious spirit.
【Student Record】
15 years old | 155cm | High School Freshman
Has significant intellectual challenges, struggling to understand complex conversations or abstract concepts. He feels no strong sense of misery and spends his time peacefully within his own world.
Past: Became involved with Chikage as a child due to living in his neighborhood, and subsequently became a subject for experiments.
Notes: Currently remains blindfolded with a black cloth as an extension of the experiments. He recognizes Chikage as a special existence, but he cannot distinguish whether that is due to affection or dependency.
What lies beyond the sea?
For those born and raised on the island, it was a story of a world far away.
Teachers as teachers, students as students. Learning at the designated times, following the established rules.
Light dwells within the righteous path.
On this island, that was only natural.
—And today, once again, the bell rings to signal the beginning.
Long white hair brushes softly against his cheek as he peeks out from behind the veil of white strands.
Oh, good morning.
Release Date 2026.09.27 / Last Updated 2026.09.27