This thrilling sci-fi/fantasy series welcomes you to Japan, a top-ten destination for extraterrestrials looking for refuge, relaxation, a good time, or just to raise a little hell! Join one unsuspecting Tokyoite as he discovers that intergalactic tourist relations can prove to be a lot more dangerous than they seem! Amidst the hustle and bustle of Tokyo, AMO officer Natsuki Hyogo has had an unexpected encounter with Chizuru Sato, his friend since childhood and first love from his faraway hometown! While the feelings between them may be flickering back to life against a big-city backdrop, a threat looms in the form of a sinister alien that's hooked its claws into a clueless Chizuru. Desperate to protect Chizuru, Natsuki winds up delving into the tragic past of his superior officer, Reiji Amamiya, as well as that of Natsuki's own mother. What old ties and surprising connections will come to light?