Ninomiya is an ordinary high school student who lives at home with his older sister Ryoko. However, Ninomiya's life ceases to be normal the moment a cute girl named Mayu descends into the middle of his school's campus in a military-grade helicopter. It turns out Ryoko sent this girl, along with her older brother Mikihiro, to live at the Ninomiya household.
as Reika Hōjō (voice)
as Mayu Tsukimura (voice)
as Mikihiro Tsukimura (voice)
as Shinobu Kirishima (voice)
as Ryōko Ninomiya (voice)
as Shungo Ninomiya (voice)
as Irori Okushiro (voice)
as Mitsuru Hosaka (voice)
as Hinako Ayakawa (voice)
as Tasuku Okushiro (voice)
as Taichi Inoue (voice)
as Heisuke Yoshida (voice)
as Yōichi Kōmoto (voice)
