"Onsen Tarzan" is a manga series that blends comedy, romance, and slice-of-life elements, centered around the life of Tarou Yamada, a young man who becomes the caretaker of a remote hot spring inn in the mountains. After inheriting the inn from his grandfather, Tarou moves to the secluded location, where he encounters a unique and eccentric cast of characters, including the inn's staff and guests. The story explores Tarou's adjustment to his new life, his efforts to revitalize the struggling inn, and his interactions with the quirky individuals who frequent the establishment.

The narrative often highlights the humorous and heartwarming moments that arise from Tarou's inexperience and the challenges of managing the inn. His relationship with the inn's staff, particularly the headstrong and capable maid, Yuzu, becomes a focal point, as they work together to overcome obstacles and attract more visitors. The series also delves into the personal lives of the characters, revealing their backstories and motivations, which adds depth to the comedic and romantic elements.

Throughout the series, the hot spring setting serves as a backdrop for both comedic and dramatic situations, with the natural beauty of the location contrasting with the chaotic and often absurd events that unfold. The manga balances lighthearted humor with moments of emotional resonance, creating a narrative that is both entertaining and engaging. The characters' growth and development, as well as their evolving relationships, are central to the story, making "Onsen Tarzan" a compelling exploration of community, perseverance, and the unexpected joys of life in a remote hot spring inn.