When your grandpa falls ill, he fears he doesn't have much time left. However, there is a legend passed down in Megamisawa Village of a fishgirl guardian spirit capable of healing any injury or illness. Fortunately, you meet Gyoin-san, an expert angler who teaches you all about fishing. With his help, make your way upstream to Hakuro Falls, where the guardian spirit resides, and reel her in!

Discover and catch various species of fish as you travel up the Megami River in intense fishing battles, where timing and perseverance are key. Along the way, help out the people of Megamisawa Village to unlock new areas and come ever closer to catching the guardian spirit. Just don't get careless—this is no leisurely fishing trip, and the path ahead isn't without its fair share of danger! Tussle with increasingly powerful animals as you make your way upstream, proving yourself as Megamisawa's strongest. And if you ever need a break from the action, you can view all the fish you catch in your aquarium!

Catch a wide variety of fish in fast-paced fishing battles and view them in your personal aquarium! Lock horns with powerful foes, including the legendary Oni Kabuto!