Kusano, a former mobster turned office worker, is asked by his boss to search for his colleague, Hirose, who has run off with company money. Trying to avoid causing a fuss, Kusano attempts to find Hirose on his own. By chance, he meets Hirose's sister, Nozomi, who is also looking for her, and learns where Hirose has gone. Hirose has fled to Kinosaki, one of Kansai's leading hot spring towns! The strange hot spring adventure of an old man and a high school girl begins!!

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