A proud bath architect in ancient Rome starts randomly surfacing in present-day Japan, where he's inspired by the many bathing innovations he finds.

Kenjiro Tsudaas Lucius (voice)
Chikahiro Kobayashias Marcus (voice)
Satoshi Hinoas Regulus (voice)
Tsutomu Isobeas Emperor Hadrian (voice)
Asami Setoas Mari Yamaguchi (voice)
Shuichi Ikedaas Utagawa Kuniyoshi (voice)
Takahiro Sakuraias Yoshida (voice)
Yoshimasa Hosoyaas Ceionius (voice)
Junya Enokias Markus Annius Verus (voice)
Sanae Kobayashias Livia (voice)
Ryo Kawasaki