Mihira Sanpei speaks with a Tohoku‑style accent and is an earthy, upbeat young man. Yet whenever fishing comes up, he turns serious; it is his greatest passion. The village where he resides offers a natural setting that presents many fishing trials. Though inexperienced, Sanpei possesses an exceptional instinct for angling and chooses to sharpen it by joining various competitions. Confronting diverse obstacles, he learns to tackle tough problems and grow from errors until he can haul any catch from the water. Along his journey, he meets a host of rivals and allies who boost his experience points and aid his development in his growth daily.