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 is met with phallus worshipping in both past and present times.
Lucius is sent to a water park looking for something for the children to do.
Lucius happens to resurface at a murder scene.
Lucius visits a spa.
Lucius is beseeched by his friend, Marcus, to help his younger sister, Pietrada, whose bad teeth turns away any potential marriage candidates. Travelling to modern day times again, Lucius discovers the wonder of toothbrushes.
Lucius ends up at Yoyogi Animation Academy, where he experiences a guided tour of the academy, learning various aspects of animation such as moe and after-recording along the way.