
Kannami Yuichi is stationed at Uris, a frontline base in Europe. He has no memories of the past prior to arriving there, but he knows he is a Killdre, and knows how to operate a fighter.
Yuichi's ability is soon acknowledged and he becomes an ace pilot. Then, he meets a girl, Kusanagi Suito, a commander of the base, who is also a Killdre and used to be an ace pilot as well. Although they are meeting for the first time, they feel as if they had known each other for a long time and soon they become close. However, one day, she asks him a surprising thing: "Can you kill me? Otherwise, we cannot escape from all this."