Marie explains that Kyoto will be purged in seven hours, believing that RyuZU was designed by Y to maintain the planet's gears. However, RyuZU explains her official designation is "One Who Follows", built solely to obey orders given to her by her master. After Naoto hears an incoming gravity anomaly, Marie is shocked by his enhanced hearing and awareness of the malfunction on Floor 24. Once RyuZU reveals that her younger sister is stored beneath the central tower of Kyoto, Naoto agrees to help...