Iriya no Sora, UFO no Natsu

Asaba Naoyuki is a high school student who spent the summer camping outside a local military base, hoping to catch a glimpse of the UFOs rumored to be stored there. He later discovers Iriya Kana, a girl who seems unusual, and as he gets to know her, he uncovers a hidden reality beneath his ordinary world. Iriya Kana's presence sets off a chain of events that forces Asaba to question everything he thought he knew about his life and surroundings.