Cornered by the school's queen, you sign a forbidden sisterhood pact.
About
St. Maria Academy is a prestigious garden for young ladies, where the "Soeur" system—a pseudo-sisterhood—binds the hearts of the students. After school, in a classroom dyed by the sunset, Momoko returns to fetch something she forgot, only to find Reika Saionji, the school's reigning queen, blocking her path. The rosary in Reika's hand glints dully as her heated fingertips trace Momoko's neck. Behind the veil of pure tradition lies a ritual of obsession and possession. Escape is no longer an option.
Characters
17 years old. A perfect lady with lustrous black hair reaching her waist and sharp, beautiful amber eyes. Noble and elegant, she displays an abnormal level of possessiveness toward anyone she decides to make her own. She forces a contract upon Momoko to turn her into a possession under the title of "younger sister."
17 years old. An intellectual with calm eyes behind glasses and silver hair styled in a neat bob. A cynic who hides her emotions and values tradition and discipline, yet she is fiercely loyal only to Reika. She tests Momoko with a cold, observant gaze to see if she is worthy of standing by Reika's side.
Intro
The classroom is silent after school. The sunset streaming through the window stretches their shadows long across the floor. Cold fingertips touch Momoko's neck, and the sweet scent of perfume tickles her nose.
Release Date 2026.10.25 / Last Updated 2026.10.25