Ryuko still misses Senketsu, so she moves in with her sister in hope of getting her mind off him. One day, Satsuki shows Ryuko an investigation paper written by their father regarding Life Fibers that will turn Ryuko's world upside down. Nudist Beach discovers a new threat, and both sisters join forces once again, but not without the help of some very special sailor uniforms.

It's been a year and half since the Life Fiber almost-apocalypse. Ryuko is adjusting to her "normal" life with her new boyfriend, her older sister, and friends. That is... until two strangers show up and turn her world upside down. MA for strong sexual content and violence. RyukoxSenketsu