Minase Shizuru leads a sheltered existence at her elite academy, surrounded by peers from influential families. Her ordinary days end abruptly when she and several classmates are seized by Tsuruma Consulting, with the young heir Tsuruma among the captors. Delivered to a remote research facility, the group discovers they have become subjects in undisclosed experiments. Bound by shared resolve, they begin quietly seeking any route to freedom from their isolated prison.