Authentic Edo period original, c.1835, Japanese erotic art shunga woodblock print picture by Kunisada Utagawa (1786-1865).  From the shunga series, Kari no fumi.  
Shunga picture measures 22.2 cm x 26.5 cm.  Excellent colors and impressions!  Condition is very good with just a couple tiny wormage spots at bottom corners.  No backing.  Please see and judge from photos.
 
Part 2 of 2 - A young creepy pervert continues to masturbate outside in the rain at the window of two lovers at night.  Quite likely the same bamboo-flute-playing lovers from the other "Windy Night" two-part series of shunga scenes.