Mihira Sanpei talks with a Tohou accent and is a down-to-earth boy with a cheerful and optimistic personality. However, when it comes to fishing, he becomes very serious and is a youth who enjoys fishing more than anything else. The village where he lives in is a natural environment which provides different kinds of fishing challenges. Despite his lack of experience, Sanpei has a first-rate sense with regards to fishing and decides to maxmise his potential by entering into different fishing contests. As he faces various challenges, he learns to solve difficult problems and learn from his mistakes to the extent that he is able to fish anything out of the waters. Along the way, he encounters all kinds of rivals and companions who increase his experience points and help him in his growth.

Jacques Herbelin is the faithful husband of Louise and the proud father of Cécile, a kind little girl. But Louise does not reciprocate her husband's affection and prefers to cheat on him in the arms of Marquis de Condottier. The latter is a sinister character who, not satisfied with being Herbelin's wife's lover, sets his heart on their daughter, who has now become a pretty young lady. Jacques can't take it anymore.

Maria is the wife of self-styled naturalist Mathius. Alas, Maria's husband spends more time with his beloved woodland creatures than with her. Yearning for a visit to the Big City, Maria leaves herself wide open for disillusionment and heartbreak.

Doctor Rougel is so absorbed in his work that he neglects his wife Nadine, who is subjected to the advances of Gérard Bérault, an admirer. A series of unfortunate events leads the doctor to doubt the fidelity of his wife, and he shamelessly throws her out. Michèle, the Rougels' little daughter, sick from despair, will eventually reunite her estranged parents.