Authentic Edo period original, from the Tenpo era, 3rd year (1832), Japanese erotic art shunga woodblock print trick picture (shikake-e) by Kunisada Utagawa (1786-1865).  From the shunga series, Aki no nanakusa.  Shunga picture measures 22.1 cm x 27.7 cm.  Very good colors and impressions.  Condition is decent with some wear, soiling, a couple of stain spots at top border.  No backing.  Please see and judge from photos.
 
A comical & rare shunga trick picture that shows the before and after scenes of a couple getting busted in the midst of intercourse when each of the two bottom flaps of the picture are turned upwards.