Lucius Modestus, an ancient Roman architect, finds himself job-hunting due to having trouble coming up with new ideas. As his demeanor and personality become dismal, his friends try taking him to a bathhouse for him to relax. Unable to unwind in the bustling and crowded bath, Lucius dips his head in the water. Down there, he finds a secret tunnel that transports him to a modern-day Japanese bathhouse, providing him the inspiration he needed to make a new creation. Loaded with what seems to be knowledge way ahead of his time, Lucius does his best to try and recreate his findings, usually inferior in quality due to his circumstances. However, the sheer ingenuity may be just enough to gain the attention of the citizens and regain his reputation as an architect. Note: MAL considers this show to be three episodes and not five. See More Info for additional details.

Bonus episodes included with the BD/DVD. The first episode consists of Miwaku no Farosu (Alluring Pharos) and Sanshimai OL Terumae Satsujin Jiken (The Three Sisters of Thermae Romae Murder Case). The second episode consists of Subesube ni Naritai (I Want to Have Smooth Skin) and Hitasura Suberitai (I Just Want to Slip).

It is summer break and Keima intends to spend all his time on video games. An old acquaintance, the timid girl Tenri, comes back into the neighborhood—and apparently has a lost soul inside her. It is up to Keima and Elysia to unravel the secrets of her heart. (Source: ANN)

Shima Kawauchi was taken in by his kind grandfather following the divorce of his unloving parents. His grandfather passes away in due time, leaving Shima all alone. Consumed by grief, he cries by the oceanside at night when an accident causes him to fall into the water. Unable to swim, Shima nearly drowns but is saved by an incredibly handsome merman. Seeing Shima's emotional state, the merman—who Shima names Isaki—insists that Shima take him home until he fully recovers. However, as they settle into their space together, the two start to form a bond that transcends both species and gender.