Ryota Murakami (voiced by Ryota Oosaka), a second-year high school student with excellent academic performance, is the only member of the astronomy club. In his childhood, he had a very good friend "Black Cat", but in an accident, the girl Black Cat was declared dead in order to rescue Ryota. This incident gave Ryota a heavy blow and trauma, so he hoped to look up at the stars instead of Black Cat and find the legendary aliens. On this day, the beautiful girl Kuroba Ningzi (voiced by Risa Taneda) transferred to Ryota's class, and he was surprised to find that Kuroba looked very similar to Black Cat. Ningzi is a strange and mysterious girl. She can't do multiplication, but she can predict the death of others. She saved Ryota, who was supposed to die, in the rainstorm and revealed her identity as a magician to the other party. In order to protect Ryota, Ningzi refused to have too much contact with him. However, Ryota, who is full of curiosity and has many questions about the past, still broke into a mysterious and dangerous world without hesitation... This film is adapted from the original work of Okamoto Ren.