That's a tribute to John Willie's bondage comic "Sweet Gwendoline". She was the main character of his bondage comic series, who always gets tied up. It's one of the most popular bondage comics which were mainly published in the 1950s and 1960s.
Painted with water color pencils 4B and 8B.
Sweet Gwendoline (c) by John Willie (1902 - 1962)