Jitsu wa Watashi wa実は私は; En vérité je suis…; eu sou...; In realtà io sono...; La verdad es que... yo soy...; Na verdade; Sa toto; Tak naprawdę jestem...; WaWaWa; По правде говоря, я...; จุ๊ จุ๊ จะบอกว่าฉันคือ...; 其实我是; 사실 나는; ben ik...; Eigenlijk; Doğrusu ben...; My Monster Secret; The Truth Is I Am…; My Monster Secret: “Actually, I Am…”

Kuromine is a guy who does not lie, hence his nick name "a bag full of holes". But everyone has secrets, and even Kuromine has one. Meet the very lovely, elegant, and mysterious Shiragami whom Kuromine has new found affections for... But what is this? Why does she have humongous wings when no one's looking and super long canines? Something is very different about this girl...