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?
| Actor | Role |
|---|---|
 Hiroe IgetaNot listed | Not listed |
 Miyu OgawaNot listed | Not listed |
 Yuuna WatanabeNot listed | Not listed |