“Superb portrayal of Otsuya who is left to her own devices, and here she leafs through an erotic book, no doubt pining for Tokushichi.”
Look for the subtle detail of her dripping private parts.
Reference: p.197 (Fig. 75c) in Japanese Erotic Fantasies by Chris Uhlenbeck.
Original antique Japanese color woodblock print. Shunga (Erotic picture).