Happy of Fairy Tail was summoned to another world and became a hero! And its inhabitants aren’t human… They’re animals, with ears and tails to match! Guided by a mysterious talking heart, Happy soars through the skies of this new world, helping the friends he’s making along the way, like a cute bunny, an alluring fox, and even a dog that scares him! What is this place? And will Happy ever make it back home to Natsu and the rest of Fairy Tail?! A new adventure begins through uncharted territory, with Happy as the star and artwork by Kenshiro Sakamoto, creator of Pitch-Black Ten!
Happy the Hero needs to collect the Three Sacred Treasures so he can get back home to Natsu and the rest of the gang. But can he defeat the mighty Leon, who can draw on the regenerating powers of the Healthy Crystal?! Happy is nearly overtaken by despair, but then a red-hot flame ignites within his heart! Why was he transported to this world to be the Hero? And what's the true nature of the human girl who's looking for his help? The secrets of Happy's Heroic Adventure will soon be revealed!