Noel Hiiragi thinks that her life is stressful enough living alone and working at a call center when her mother sends her a six-drawer wardrobe out of the blue. In hopes of returning the furniture after attempting to stuff it in a corner of her tiny apartment, she calls her mother to complain about the sudden burden, but her mom only vaguely tells Noel that it is "her turn."

When Noel returns from a night of drinking, she finds a fat child in her apartment eating her food. Shocked and confused, she eventually discovers that her mother's wardrobe contains six strange children who claim to serve the current mistress of the Hiiragi family. Refusing to buy this blunt explanation, Noel struggles to adapt to her new lifestyle, wondering whether the children's service is a blessing or a curse.

Tansu Warashi. is one of the four shorts that was produced as part of Japan Animation Creators Association's Young Animator Training Project in 2010.

Under the official series title Project A, it originally aired in eight movie theaters as part of a roadshow held between March 5, 2011 and March 11, 2011. In addition, the shorts of Project A were shown weekly from March 6, 2011 to March 27, 2011 on MBS TV, with Tansu Warashi. being the last to air on the final day.