: During a group trip to an onsen (hot spring) spa, the couples decide to engage in a "marriage exchange". The Conflict
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: The series, also adapted into an ONA (Original Net Animation) by Studio Hokiboshi , utilizes its setting—the intimate, high-tension atmosphere of an onsen—to drive the narrative forward. 👔 Lifestyle & Relationship Reflections : During a group trip to an onsen
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