Masumi is late wife of Seinosuke Ando and owner of Chiyomaru.
Lassie
Masumi was coming home from work one rainy night, when she finds a little Shiba puppy. She tried to lure it out, but the puppy was too scared. A man named Seinosuke Ando came by and helped her with the little dog.
She falls in love with him and together, they adopt the Shiba and name him Chiyomaru. However, Masumi works so hard at her resturant that she becomes ill. Shortly after, she passes away.