Seine hunts creatures of the sea, a kind of parasitic bug that controls humans and influences them to do hateful things.

She possesses an immortal body and a beast called AiON that is used to lure and devour the bugs from inside the human host.

[3] Reviews on the manga were mixed, overall Anime News Network gave the first two volumes a C rating while ANN praised the story's "fantastical mix-and-match of ideas" and "Lively conversation and psychological gamesmanship in the later chapters" however, it was also seen to have plain artwork and too many subplots.

[6] The Manga Critic did a short take on the first volume calling it "maudlin, nonsensical, and boring" with bad artwork the bottom line being that the story is both predictable and emotionally flat, making it a tough sell for all but the most ardent Chibi Vampire fans.

[7] Sequential Tart gave the first two volumes both a grade of 7, saying that the first book was a solid set up for the series and has a lot of possibilities on where it can go, the review goes on to say that the plot has a serious flaw in having Tatsuya's parents and aunt and uncle out of the picture fast to get him and Seine living together in the same house.