* in the manga chapter 4 pg 13, Khi says "[[http://www.tvtropes.org/pmwiki/pmwiki.php/VideoGame/MegaMan The year 200X]], aliens landed in tokyo" a seasoned fan of said receiver of shout out should know well this reference.
* Takeya's line "beneath that smile is the face of a lizard" is reminiscent of "V."
* Io's cocoon and OvernightAgeUp is reminscent of "Species," as are the circumstances of her introduction, notably escaping a lab where she was horrifically experimented on, abused, and coming to the belief that mankind deserves extinction.
* "Mocchi", the equippable ally, head-pet that ultimately becomes Io's outfit has a vague similarity to Peke from To Love Ru.