Haruko and Kohei are a couple on the verge of marriage. Haruko attends a Thai language class once a week, where she finds herself the object of her instructor Sato's affections. Eventually, she begins to question the lackluster sex life she shares with Kohei...
| Actor | Role |
|---|---|
 Kaho KasumiHaruko Koganei | Haruko Koganei |
 Riri KoudaYuko Yamamoto | Yuko Yamamoto |
 Maki TomodaAkemi Koga | Akemi Koga |
| YYasunari KubotaKohei Go | Kohei Go |
 Yuya IshikawaYoshinori Sato | Yoshinori Sato |
| YYoshihiro TanbaraKeisuke Nakano | Keisuke Nakano |
 Daisuke IijimaAtsushi Koga | Atsushi Koga |