Obsessed with My Puppy Boy

At the age of ten, he shyly called out "Sister Jiang," a slender, small boy obedient like a little milk dog. She imitated the adults, kissing his forehead to comfort him.
When they met again, he was dressed in a sharp suit with gold-rimmed glasses, his every move as noble and pure as glimmering frost and snow, unapproachably lofty.
Tearing off that scholar's disguise, he finally revealed his fangs in the darkness.
"Isn't this what you taught me?" he whispered, encircling her slim waist from behind and seeking a kiss, his voice seductive, nearly playful as he called out those two words, "Sister Jiang."
Jiang Jiu only then realized that the other party had long since become an obsessive and scheming mad dog, in a place she knew not of.