Folk Records in Dajing: the Man on the Blacksmith's Pillow

I am a rough cloth craftsman who forges iron on the street, Married to the sweetest girl in town. I thought my life would be ordinary and peaceful. Until late last night, I accidentally broke into my wife and took off her hairpin. She has cold eyebrows and is wearing an undergarment embroidered with gold dragon patterns. She is not an ordinary commoner woman at all. It turns out that the person who sleeps with me every day has a shocking secret.