Thermae Romae Novae

The story is a comedy about Lucius, an architect of public bath houses in ancient Rome, who time-travels to various modern-day baths in Japan. The author explores the two cultures in the world "that have loved baths the most: the Japanese and the Romans."

Lucius ends up at the presentation of bathroom and toilet equipment by Japanese toilet manufacturer TOTO, where he learns about the most recent technological advances in that field.

Lucius ends up in a space station, where he experiences zero gravity and learns about heliocentricism.

Bonus episode included with the BD/DVD.