AIC Spirits

Anime International Company. (株式会社アニメインターナショナルカンパニー / Kabushiki-gaisha Anime Intaanashonaru Kanpanii), often abbreviated as AIC is a Japanese animation studio founded on June 15, 1982 and located in Nerima, Tokyo, Japan. On December 10, 2015, AIC RIGHTS Co., Ltd was established through a company split, in which AIC Rights received the transfer of some of the copyrights owned by Anime International Company.

Their notable works include series such as Tenchi Muyo!, Bubblegum Crisis and several adaptations of the manga Ah Megami-sama!.

AIC had eight sub-studios within itself, named: “AIC ASTA” (2003, formerly: “AIC A.S.T.A.”), “AIC Build” (2010), “AIC Classic” (2010), “AIC Digital” (1997), “AIC Frontier” (June, 2012), “AIC PLUS+” (2006), “AIC Spirits” (2003) and “AIC Takarazuka” (2006).
*wikipedia

Ninomiya Shungo is an average high school student who lives at home with his older sister Ryouko. However, Shungo's life changes when a cute girl named Tsukimura Mayu arrives on his school grounds in a military helicopter. It turns out that Ryouko sent her, along with her older brother Mikihiro, to live in their home.