Sex parties and X-rated pranks — not exactly kidnapping and torture, but new bombshell videos and photos reveal that kind of wild, bacchanalian atmosphere during the bizarre crypto kidnapping case that’s landed John Woeltz and William Duplessie in jail.

TMZ obtained this footage showing their alleged victim — Italian businessman Michael Valentino Teofrasto Carturan — hanging out, grinning and frequently shirtless, with other partygoers inside the Manhattan townhouse Duplessie and Woeltz were renting.

Another pic shows the Italian investor sitting in a wheelchair, sipping a drink and eating a sandwich, while the Blake Lively flick, “Another Simple Favor” is projected on the wall behind him.

While none of the images show Carturan in distress, that doesn’t mean it didn’t happen at some point. We’re told this footage was all captured within a 2 or 3-day period during the nearly 3 weeks Woeltz and Duplessie allegedly held Carturan against his will.

TMZ previously posted another outrageous scene — recorded May 11 at 1:45 AM — of Carturan tied to that wheelchair with his hands free to cook crack cocaine in an air fryer … at least 2 other people in the room watch and laugh.

As we’ve reported, Woeltz and Duplessie are being held without bail after prosecutors charged them with kidnapping, unlawful imprisonment, assault and criminal possession of a weapon. These images seem to call into question whether, or for how long, Carturan was held against his will.