With the promise made to their deceased father in his heart, the older brother, Toshiki, has continued to protect his younger sister, Fumiko. Now that Fumiko is getting married, the burden he carried should have finally been lifted, but a long-buried "secret" of Fumiko has resurfaced.
| Actor | Role |
|---|---|
 Ryohei SuzukiKato Toshiki | Kato Toshiki |
 Kasumi ArimuraKato Fumiko | Kato Fumiko |
 Ouji SuzukaNakazawa Taro | Nakazawa Taro |
 First Summer UikaMiyoshi Komako | Miyoshi Komako |
 Rokkaku SeijiShigeta Koichi | Shigeta Koichi |
 Midoriko KimuraShigeta Fusae | Shigeta Fusae |
 Yoshi SakōShigeta Jin | Shigeta Jin |
 Tamae AndoKato Yuko | Kato Yuko |
| OOru KyojinYamada | Yamada |
 Shunya ItabashiKato Kyohei | Kato Kyohei |
 Kotona MinamiShigeta Kiyomi | Shigeta Kiyomi |
 Azusa BabazonoNot listed | Not listed |
| RRyunosuke ShimamuraTsukaguchi Hajime | Tsukaguchi Hajime |