Naoyuki's younger sister who is in junior high school. She tends to be very loud and annoying to her older brother and does not back down easily. When Naoyuki went on a date with Kana, Yuuko ended up following and spying on them, which is probably because she was interested in finding out who Kana was.

Asaba Naoyuki is an ordinary high school student. As a member of his school's press club, he's just spent the summer camping outside the local military base, in hopes of seeing the UFOs that are secretly kept there, according to local legend. Returning to school, he meets a strange girl, Iriya Kana, and gradually comes to realize that she is more than merely strange - and that a dark secret lies beneath the world that he knows.
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(Source: Anime News Network)


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Yuuko Asaba