Don't Make Any Noise, My Classic of Mountains and Seas Is Killing Me

The ancient ferocious beast Lailai: I started chasing my wife as a dog. ~ My boyfriend is an ancient ferocious beast from the Book of Mountains and Seas. I, Jiang Jiudian, am a useless member of the Beast Control Academy, with an F-level talent. The contract beast is a short-legged native dog picked up from the wet market. The whole school laughed at us for being a loser combination. (Sweet pet, nurturing type)