Hone Dragon no Mana Musume

In the Forest of Scraps, a realm where discarded items and forgotten things gather, an ancient dragon spends his twilight days in slumber. That is, until one day, an abandoned child appears before him. The small human is named Eve, and despite being just five years old, she has managed to survive the myriad dangers that lurk around them. Moved by compassion, the dragon decides to take her in and raise her as his own, even as his time grows short. Five years pass, and the dragon breathes his last, leaving Eve alone in the world. Unbeknownst to him, Eve possesses more resilience and potential than he could have imagined, and their reunion might come sooner than expected. With the hope of enhancing Eve's control over her magical abilities before his resurrected form fades, the skull dragon embarks on an adventure alongside his impulsive human daughter. But who can predict the kind of trouble they might stumble into? Source: J-Novel