Gosenzo-sama Banbanzai!

Synopsis:

Tamiko, Kinekuni and their son Inumaru live in an apartment in Japan and live a relatively slow and quiet life, until one day a beautiful girl named Maroko shows up at their door step. She proclaims herself as being from the future, and has traveled to the past to visit her distant relative: Inumaru, her grandfather. What follows is a wildly philosophical and intellectual journey: Tamiko storms out of the house, refusing to believe the whims of this new stranger; and Kinekuni and Inumaru invite her into their home. With spandex-clad time policemen after Maroko and the ethical dilemma of time travel at every turn, the Yomota’s will try their best to remain a family.