Kido Tsumugi

"Being called mama makes me feel so happy, doesn't it?"

She is a young wife in a newly married family but her husband had been transferred away for a year after six months of marriage.
To distract herself from her loneliness and because she promised her husband to have a baby when he came back.
She became a contracted staff member of "Bunny's Mam" as a rehearsal for raising a child.
Because she is still a newcomer, and her personality is a bit childish to begin with, she is struggling to become a "mom" and has an image of an older sister rather than a mother.