Thermae Romae (2012) Timeline Explained – Every Event in Order

Lucius refused to build the bath for Ceionius after witnessing Ceionius attempt to assault Satsuki at a Roman gathering. Defended by Antoninus, Satsuki escaped the attack, and Lucius was outraged by Ceionius's behavior. Because the commission came directly from Emperor Hadrian as a way to honor Ceionius as his chosen heir, Lucius's refusal was an act of defiance that placed his career and even his safety in jeopardy.

Foreshadowing: Hadrian's earlier decision to favor Ceionius over Antoninus had already strained the political atmosphere, making Lucius's loyalty to Satsuki the tipping point.

• lucius
• ceionius
• bath
• refusal
• hadrian
• heir

Satsuki advised Lucius that Hadrian's legacy would suffer if he chose the unworthy Ceionius over the more capable Antoninus. Following her counsel, Lucius agreed to build a medical bath along the Danube to treat wounded Roman soldiers, which dramatically boosted troop morale. He then told Hadrian that the project was Antoninus's idea, allowing Antoninus to take credit for the military initiative and strengthening his position as a worthy successor.

Foreshadowing: Satsuki had already begun studying Latin and learning about Roman politics, positioning herself to give Lucius meaningful strategic advice.

• hadrian
• antoninus
• heir
• succession
• danube
• lucius

Hadrian was deeply grieving the death of Antinous, his young lover who had drowned in the Nile. He came to believe that a Nile crocodile housed near his villa was the reincarnation of Antinous. Lucius was commissioned to design a suitable habitat for the creature, blending his technical skill with Hadrian's personal mourning and mystical beliefs.

Foreshadowing: Hadrian's obsession with Antinous is referenced again later when he insists on honoring Ceionius, hinting that his personal attachments continue to cloud his political judgment.

• hadrian
• antinous
• crocodile
• nile
• habitat
• reincarnation

The film treats the time portal as a whimsical comic device rather than a scientific mechanism. Lucius first discovers it while bathing in a Roman bathhouse, and the tunnel repeatedly activates when he is near water under stress or surprise. Whether by falling into a well, slipping in a bathroom, or emerging from a Tokyo river, water serves as the recurring trigger that pulls him across centuries.

Foreshadowing: Lucius's very first discovery happens in a bath, establishing water as the consistent element connecting the two eras.

• time travel
• tunnel
• water
• bath
• rome
• japan

Lucius was a married Roman man living in the 2nd century, bound by social and cultural expectations of his time. While he cared deeply for Satsuki and valued her counsel, he did not share her romantic understanding of their relationship. He expressed genuine gratitude and reassured her that their paths would cross again, but he could not return her confession in kind.

Foreshadowing: Earlier, Lucius showed warmth toward Satsuki but consistently framed their bond around ideas and architecture rather than romance.

• lucius
• satsuki
• romance
• confession
• feelings

The Danube bath was designed as a medical facility for wounded Roman soldiers stationed at the empire's northern frontier. By combining the relaxation of a bath with therapeutic recovery, Lucius created a space that restored morale and physical health to weary troops. The project became so successful that it allowed Lucius to redirect Hadrian's attention toward Antoninus as a capable leader.

Foreshadowing: Lucius had already demonstrated the restorative power of baths in his work for Hadrian, foreshadowing how the same principle could apply to military recovery.

• danube
• bath
• soldiers
• medical
• lucius
• antoninus

Satsuki accompanied Lucius back to Rome after he fell into a well in Japan and materialized near her at an onsen. While she was tending to his injuries, both were unexpectedly pulled through the portal together. Their joint arrival in Rome made her a direct witness to imperial politics, which ultimately allowed her to advise Lucius on how to handle Hadrian's succession crisis.

Foreshadowing: Earlier water-related accidents had already shown that the portal could activate for Lucius under surprising circumstances, hinting that others could be pulled along too.

• satsuki
• rome
• onsen
• portal
• well

The ending mirrors the film's playful use of water as a portal between eras. After Lucius assured Satsuki that they would reunite, she later spots him emerging from a river in Tokyo, implying that the same mysterious connection that once pulled him from Rome into Japan has finally brought him across the centuries to meet her again. The film treats this reunion as an emotional payoff rather than a scientific explanation.

Foreshadowing: Lucius's recurring transport through water throughout the film sets up the expectation that any large body of water could trigger another crossing.

• lucius
• tokyo
• ending
• reunion
• water
• satsuki

Ceionius had been raised as Hadrian's favored heir and carried a strong sense of entitlement. When Satsuki appeared in Rome as a foreign, unaccompanied woman with no political protection, he treated her as someone he could exploit. His behavior revealed the moral character that made him unfit to rule, ultimately becoming the reason Lucius rejected his commission.

Foreshadowing: Hadrian's earlier insistence on building a bath in Ceionius's name already hinted that Ceionius was being groomed without being truly vetted.

• ceionius
• satsuki
• assault
• rome
• heir

Lucius discovered that his wife was having an affair with his closest friend, which sent him into a period of depression and emotional withdrawal. Rather than retaliating, he channeled his energy back into his work for Hadrian, using his craft as a means of recovery. The affair is presented briefly and is treated as a passing hardship rather than a central conflict.

Foreshadowing: Lucius's emotional vulnerability after the affair mirrors his earlier awe in the Japanese bathhouse, suggesting he is a character who processes pain through reflection rather than confrontation.

• lucius
• wife
• affair
• depression
• friend

After returning to her own time, Satsuki pitched a manga series to a publisher inspired directly by her travels to ancient Rome and her connection with Lucius. The manga serves as a meta-narrative device, turning her real adventures into a creative work that preserves the memory of Lucius and bridges the gap between their two eras.

Foreshadowing: Satsuki had already been established as an aspiring manga artist before her first encounter with Lucius, foreshadowing that her creative ambitions would eventually absorb the story.

• satsuki
• manga
• tokyo
• publisher
• lucius

Hadrian's first choice of Ceionius reflected a personal decision shaped by court politics and proximity rather than proven leadership. As Lucius later demonstrates through Antoninus's strategic contributions, Hadrian's judgment was clouded by favoritism until external pressure and the failure of Ceionius's character forced him to reconsider.

Foreshadowing: Hadrian's earlier emotional projects, like the crocodile habitat for Antinous, hinted that he made decisions based on personal attachments rather than reason.

• hadrian
• ceionius
• heir
• succession
• antoninus