A boy-meets-alien-girl story with an academic twist, the series follows a bookish biology student whose encounter with an extraterrestrial turns him into an alien hunter. [Wikipedia](https://ja.wikipedia.org/wiki/%E3%81%99%E3%81%84%E3%81%B8%E3%83%BC%E3%82%8A%E3%83%BC%E3%81%B9!)