Kyoma and Mira find themselves at a public bathhouse, where a malfunction in the facility's aging robot attendant triggers an unexpected crisis. What begins as a simple visit quickly spirals into chaos as the machine's erratic behavior threatens the safety of innocent bathers. The pair must work together to diagnose the problem and restore order before things escalate further. This OVA strips away the high-stakes dimension-hopping adventure that defines the main series, instead offering a lighter, character-driven story grounded in everyday Japan. There's genuine humor in watching these two navigate an intimate setting where their usual problem-solving methods face practical limitations. The bathhouse setting creates an amusing contrast with their typical coil-hunting escapades, forcing them to adapt their approach. What makes this special is how it reveals character dynamics through mundane circumstances. Their banter takes center stage, letting you appreciate their partnership outside life-or-death situations. If you enjoy the chemistry between Kyoma and Mira but want something more relaxed than the main narrative, this captures their dynamic perfectly while delivering unexpected laughs.