Sakai plays Rui, a 35-year-old single woman forced to live alone after the aunt who raised her suddenly decides to get married and move out. Through an unexpected set of circumstances, she winds up becoming roommates with an aging ladies’ man named Tony and a timid younger man named Kosuke.
| Actor | Role |
|---|---|
 Maki SakaiRui | Rui |
 Takahiro NishijimaKosuke | Kosuke |
 Tatsuya FujiTony Tanaka | Tony Tanaka |
 Mariko KagaToba-chan | Toba-chan |
 Sawa SuzukiNanako | Nanako |
 Sei HiraizumiGou Inoue | Gou Inoue |
 Masato HagiwaraDoctor Mizutani | Doctor Mizutani |
 Ryosei Tayamashop owner | shop owner |
 Kimiko YoYasuko Tanaka | Yasuko Tanaka |
 Sansei Shiomilibrary director | library director |
 Reiko KusamuraMrs. Katsuragi | Mrs. Katsuragi |
 Kyusaku ShimadaEditor Kuraki | Editor Kuraki |
 Daikichi SugawaraProfessor Ishibashi | Professor Ishibashi |
 Tōru Shinagawabus dispatcher | bus dispatcher |
| SSaburo Tamuraprofessor Ootani | professor Ootani |
 Yoshiyuki MorishitaSasajima | Sasajima |
 Wakaba IrieSasajima's mother | Sasajima's mother |