Anime Dragon Evolution

Hello everyone, Fuji Saito Desu! Did you know?... when I woke up in this dark and scary rough cave the first thing came to my mind is I got Kidnap. But who will kidnap a useless teenager like me?... even the kidnapper sell my kidney they will gain nothing because it's already full of impurities and on the brink of destruction! that's what I got for drinking tons of Drinks. Back to the topic I'm currently strolling this dark cave and noticed that I have a tail and there's a glowing fly circling around me. Arriving in front of water pond I saw a Dragon that has cool appearance it has Black scales around it's body and Glowing violet hair. Wait!? is this me? I become a dragon!