Kotoko, who has just started high school, feels bored on a daily basis. Seated behind her in class is Sachi Seto, who is struggling with illness. Though she has not yet met anyone, they all call her Sacchan. One day, a mysterious girl appears before Kotoko, changing her boring existence. Who is she?
| Writing | Sara Ogawa | Writer |
| Editing | Sara Ogawa | Editor |
| Camera | Hiroshi Okuyama | Director of Photography |
| Directing | Sara Ogawa | Director |
