Tsumiki no Ie

An old man lives in a town that has become submerged in water.

As the water rises, he's forced to build additional levels onto his home with bricks (cubes) in order to stay above water.

One day, the old man accidentally drops his favourite pipe into the lower levels of his home, and decides to rent scuba diving equipment in order to go searching for his pipe.

As he descends through his sunken home, the old man recalls memories of the past in each room.

Note: Tsumiki no Ie won the Best Animated Short Film category at the 81st Annual Academy Awards.