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.
Miyuki Sawashiro
Reika Hōjō (voice)
Mai Kadowaki
Mayu Tsukimura (voice)
Ken Narita
Mikihiro Tsukimura (voice)
Saeko Chiba
Shinobu Kirishima (voice)
Michiko Neya
Ryōko Ninomiya (voice)
Junji Majima
Shungo Ninomiya (voice)
Hiromi Tsunakake
Irori Okushiro (voice)
Kouki Miyata
Mitsuru Hosaka (voice)
Satomi Akesaka
Hinako Ayakawa (voice)
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