Finally, the day of Mai's high school graduation has arrived. While Sakuta eagerly waits for his girlfriend, an elementary schooler who looks exactly like her appears before him. Suspicious, and for all the wrong reasons... Meanwhile, Sakuta and Kaede's father suddenly calls, saying that their mother wants to see her daughter. She was hospitalized because Kaede's condition had been too much for her to bear, so what could she possibly want now?
| Writing | Hajime Kamoshida | Novel |
| Directing | Souichi Masui | Director |
| Visual Effects | Satomi Tamura | Character Designer |
| Writing | Masahiro Yokotani | Screenplay |
| Writing | Masahiro Yokotani | Series Composition |
| Art | Souichi Masui | Storyboard Artist |
| Visual Effects | Satomi Tamura | Supervising Animation Director |
| Art | Kota Michishita | Prop Designer |
| Art | Yoshinori Shiozawa | Art Designer |
| Art | Satoshi Okubo | Art Direction |
| Visual Effects | Asuka Yokota | Color Designer |
| Visual Effects | Kengo Oda | CGI Director |
| Visual Effects | Hazuki Tanaka | CGI Director |
| Visual Effects | Saya Uchiumi | 2D Artist |
| Crew | Saya Uchiumi | Special Effects |
| Camera | Yang Xiaomu | Director of Photography |
| Editing | Akinori Mishima | Editor |
| Sound | Hidehiro Kawai | Original Music Composer |
| Sound | Tsukasa Inoue | Original Music Composer |
| Sound | Ryo Kishimoto | Original Music Composer |
