Kana is a very mysterious girl who transfers into Naoyuki's class at the beginning of the school term at the end of the summer vacation. She tends to have very little social skills and rarely talks to anyone. In effect, most of her classmates dislike her rude attitude and avoid her most of the time. The truth is, however, that she is humanity's last hope at defeating alien invaders from completely annihilating the human race. To save mankind, she is forced to pilot the "Black Manta", a super advanced fighter jet with astounding maneuverability, with which she often fights the invaders. However, by flying the Black Manta, Iriya's mind and body are constantly under incredible strain causing her to often bleed frequently, especially from her nose. Soon after meeting Naoyuki at school, she quickly develops a crush on him and because of this, she joins the school newspaper club to be with him. She places various objects in his footlocker on the days that she is present at school
