Fushichou e no Tensei: Dragon Taoseru tte Futsuu no Tori ja Nai yo ne?  

Fushichou e no Tensei: Dragon Taoseru tte Futsuu no Tori ja nai yo ne, Reborn as a Phoenix: A Normal Bird Can't Beat a Dragon, Right?, 不死鳥への転生 ドラゴン倒せるって普通の鳥じゃないよね？

In Japan, there lived a young boy who spent most of his time in hospitals due to illness. Gazing from his hospital window, he always dreamed of being a bird and flying freely through the endless sky. On that special day, he passed away only to be reborn as a unique bird with extraordinary abilities. Unlike typical birds, this creature could breathe fire from its mouth. Eager to soar, it took flight but was met with dark clouds blocking out the blue sky. These ominous clouds were said to have detrimental effects on all creatures in the mysterious land of Nouzen.