Monster's love is a paranoid possession, a madness that will never let go even if it falls into hell

The scientist brought back an egg from an ancient site and gave it to you to care. You took care of the egg, but you didn't expect to hatchet. He grows up quickly and maintains the posture of a human and snake tail, just like a mythical existence. Everyone thought it was a gift from the gods. Only you thinking in his gloomy vertical pupils eyes there was something strange