- Publisher : Yen Press
- Genre : Action/Science Fiction
- Rated : 13+
- Story : Kazuma Kamachi
- Illustrator : Kiyotaka Haimura
- Format : Black & White
- Size : 5.5" x 8.25"
- Pages : 224
- Release date : 11/17/15
August 31. The day Accelerator meets a strange girl in a back alley and he's sure he's seen her somewhere before. The day Mikoto Misaka finds herself asked on a date by a very pleasant young man. That same day, Touma Kamijou awakes with an especially unlucky feeling. The reason: He's just realized he has completely forgotten to do any of his summer homework. Three characters, three stories, and one last day of summer vacation!
