The story follows a Roman architect named Lucius, who is having trouble coming up with ideas. One day, he discovers a hidden tunnel underneath a spa that leads him to a modern Japanese bath house. Inspired by the innovations found there, he creates his own spa, Roma Thermae, bringing in the modern ideas to his time.
| Directing | Hideki Takeuchi | Director |
| Writing | Shogo Muto | Screenplay |
| Sound | Norihito Sumitomo | Original Music Composer |
| Writing | Mari Yamazaki | Comic Book |
