* In the manga chapter 4 pg 13, Khi says "[[VideoGame/MegaMan In 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 ''{{Series/V 1983}}''.
* Io's cocoon and OvernightAgeUp is reminscent of Film/{{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 Manga/ToLoveRu.
*May be unintentional, but the series feels very similar to Manga/{{Chobits}} - slightly awkward guy is saddled with a hot, ditzy girl who refers to herself in the third person. Harem hilarity ensues.