mummification \(bound\), tape, arms behind back, breasts, hairclip, hair ornament, grey background, feet, standing, blush, matoi ryuuko, 2girls, multiple girls, gagged, bound, kiryuuin satsuki, black hair, gag, bdsm, bondage, improvised gag, tape gag, siblings, sisters, barefoot, epaulettes, multicolored hair, senketsu, toenails, toenail polish, long hair, blue eyes, streaked hair, tied up (nonsexual), school uniform, nail polish, restrained, bound legs, red hair, short hair, serafuku, toes, junketsu, bound together, bound arms, looking at viewer, two-tone hair, full body, blue nails, simple background