Authentic Edo-period original Japanese erotic art shunga woodblock print by Utagawa Kunisada (1786–1865), c.1827.  From his shunga series, Ehon Koi no Kaguya.
 
The shunga picture measures 26.7 × 20.8 cm.  Very good colors and impressions.  Condition is decent+ with some age-related wear and soiling and a small amount of wormage.  Album backing.  Please see and judge condition from the photos.
 
A wonderfully daring Kunisada shunga scene in which an impatient couple steal away from a nearby gathering for sex on the staircase.  While guests drink and converse in the adjoining room, the lovers remain separated from them by little more than the wooden framework of the house.  The woman braces herself against the post as her lover takes her from behind, giving the composition a terrific sense of urgency, secrecy, and the very real possibility of discovery.