Ultragirls app

Supergirl flips open the app on her phone, thumb hovering over the test button. She calls Rose in. One tap and Rose stiffens, locked where she stands. Supergirl grabs rope, winds it tight around wrists and elbows, then doubles Rose’s legs up and knots everything together into a strict hogtie. Last she jams a cloth deep between Rose’s lips and cinches it hard. Job done. Ultragirl bursts through the door, eyes wide at the sight of Rose writhing on the floor. Supergirl is already waiting. Another tap freezes Ultragirl mid-step. Supergirl loops rope around her ankles, cinches the knot, then pulls her arms behind her back and knots wrists to elbows. She connects the two bindings with a short length, leaving Ultragirl arched and helpless on the concrete. Supergirl opens a second slider on the screen. The pitch hum starts low, climbs until it drills straight into their skulls. She smirks, turns, and steps out, door clicking shut. The sound keeps rising. Rose and Ultragirl thrash, ropes creaking, jaws straining against gags. Sweat slicks their skin. Every twist burns, every failed pull tightens the knots. But rage keeps them moving. One last desperate twist and the first knot pops. Another yank and the rest give way. They hit the hallway at a run. Supergirl barely turns before they swarm her. Rope bites into her legs, more coils lock her arms behind her back. Ultragirl snatches the phone, slides the same lethal frequency into place, and drops the device on the floor beside her. The hum kicks in again, louder now, drilling into Supergirl’s temples as they walk out and slam the door.