Year 2027, The city of Kyoto has undergone tremendous advancement. Within the city lives Naomi Katagaki, an introvert and Ruri Ichigyō, a girl with a cold personality. Both share a love for reading books. Despite having similar interests, Naomi is afraid to approach Ruri due to her unfriendly nature. One day, as Naomi goes out for a walk, a crimson aurora pierces through the sky for a brief moment. Shortly after, he sees a three-legged crow and a mysterious man who reveals himself to be Naomi from 10 years in the future, explaining that he has come to change a tragic event that happens to Ruri shortly after they start dating. Naomi follows his future self's instructions and starts getting closer to Ruri, determined to save her. With the help of his future self, Naomi begins his preparations to save Ruri. Will he be able to change the future?
| Art | Yusuke Takeda | Art Direction |
| Sound | Yoshikazu Iwanami | Sound Director |
| Directing | Tomohiko Ito | Director |
| Art | Tomohiko Ito | Storyboard Artist |
| Visual Effects | Tomoshige Inayoshi | Key Animation |
| Visual Effects | Yukiko Horiguchi | Character Designer |
| Writing | Mado Nozaki | Screenplay |
| Visual Effects | Masahiko Suzuki | Key Animation |
| Sound | 2027Sound | Original Music Composer |
| Camera | Yoshiki Obata | Director of Photography |
| Sound | Satoshi Fujihara | Theme Song Performance |
| Sound | Daisuke Ozasa | Theme Song Performance |
| Sound | Makoto Narazaki | Theme Song Performance |
| Sound | Masaki Matsuura | Theme Song Performance |
