Here's a report purely for the sake of completeness: in Joker Game a really ugly old lady is roped to a tree in episode #3 around 3:45.
And for those who prefer GID scenes (I'm not one of them) there are a number of such in episodes #5, #7, #10, and #11, mostly involving handcuffs but in #5 the scene includes a cleave gag.
Anime Sightings Old and New - Joker Game
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