Thermae Romae Novae

Lucius Modestus, a Roman architect, faces a creative slump and struggles to find new ideas, causing his friends to try and help him relax at a bathhouse. Frustrated by the crowded conditions, Lucius discovers a secret tunnel beneath the water that unexpectedly transports him to a modern Japanese bathhouse. There, he gains access to advanced knowledge that helps him create new designs, although his attempts to replicate them in ancient Rome often fall short due to limited resources.