Sekirei (2008 - 2010)

Sekirei is a Japanese anime drama series that follows a teenage boy and the strange happenings when a mysterious girl literally falls from the sky. When Musubi literally falls out of the sky into Minato's arms and informs him she is a Sekirei, a powerful warrior who takes part in a mysterious competition. When he learns that she has bound herself to him he must immerse himself into this new world and learn everything he possibly can about this game and the forces that control it.