The story centers on Kakeru Nishizawa and Mami Sakaniwa, two people who find each other through a dating app, and decide soon after to get engaged. After their engagement, Mami suddenly disappears. In trying to find her, Kakeru must confront a side of Mami's past that he might not have wanted to know.
| Actor | Role |
|---|---|
 Taisuke FujigayaKakeru Nishizawa | Kakeru Nishizawa |
 NaoMami Sakaniwa | Mami Sakaniwa |
 Yuki KuraNot listed | Not listed |
 Kenji AnanNot listed | Not listed |
 Hitomi MiyauchiNot listed | Not listed |
 Akiko KikuchiNot listed | Not listed |
 Yoshiko MiyazakiNot listed | Not listed |
 Naomi NishidaNot listed | Not listed |
 Bibari MaedaNot listed | Not listed |