Complex sentence: Then, a nurse pushes a wheelchair-bound zombie-like Maki onto the rooftop, who says that the only reason she is still living is so that she could meet friends like Rina.
Split into simpler sentences: Then, a nurse pushes a zombie-like Maki in a wheelchair onto the rooftop. Maki says that the only reason she is still living is so that she could meet friends like Rina.