Gosenzo-sama Banbanzai!

 is a 1989 Japanese comedy drama science fiction OVA written and directed by Mamoru Oshii and animated by Pierrot. A compilation film consisting of footage from the episodes entitled , also directed by Oshii, was released in 1990.
Plot.
The story revolves around a small, normal family known as the Yomota family: A boy named Inumaru, his father Kinekuni and his mother Tamiko. One day, a beautiful girl with a yellow flower hat at their front door, calling herself "Maroko Yomota," granddaughter of Inumaru who travels back in time with a time machine to visit her ancestors. Despite Tamiko's strong refusal to acknowledge her as a Yomota, Kinekuni and Inumaru welcome her to stay with them, and the structure of a happy family has begun to collapse.
The episodes are told in the form of a play.
Soundtrack.
The CD was released on August 21, 1993.