Birthday

Sonic had never knew about the term Alpha, Beta, and Omega before. His instincts were to always fight crimes and safe everyone from any dangerous attacks from monsters, he never paid any attention to his true nature...not until he started to feel different with his body.

some warnings:
- book may contain NSFW
- sonadow
- omegaverse
- eggman is not here lmao
- please do not use any of my art from this book, i worked hard on it so don't steal

Also, this is my first time writing omegaverse so i'm sorry if there are many mistakes here and there!