This is the story between single mother housekeeper and mathematics professor,who has a brain damage.
| Actor | Role |
|---|---|
 Akira TeraoProfessor | Professor |
 Eri FukatsuKyoko | Kyoko |
 Ruriko AsaokaWidow | Widow |
 Hidetaka YoshiokaRoot | Root |
 Hisashi IgawaHousekeeper Agent | Housekeeper Agent |
| TTakanari SaitoRoot (young) | Root (young) |