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This is body swap. (Guy broke the rule of their contract by failing to give the succubus his semen every day, so she body swapped with him.) Note from the wiki about the body swap tag: "Should not be tagged as gender bender even if the person swaps with someone of a different gender." So this should not be tagged as gender bender.

Base +7, Hidde +6, bunnyboyxd +6, Stoicism -6, J Shadow -6, xyzdragon +8, aasp2 +27, AnonymousCat -6, hitmeup -6, Airresistible +4, Leni López Lara -6, Megaton +42, b911 -7, and 4 more...

@Thacker
You're right but good luck trying to get people to follow that rule.
To play devil's advocate though perhaps a tagging rule being unpopular is justification for not following it.

Base +6, bunnyboyxd +6, Sylvrwolflol +7, xyzdragon -8, yunnch +6, nickel2213 +6, ZN12345 +6, AnonymousCat +6, hitmeup +6, slimedog +10, BZFS +6, Megaton +42, b911 +7, and 3 more...

It's basically impossible to search for GB body swaps.

Base +7, yunnch +6, hitmeup +6, Stoicism +6, AnonymousCat +6

GB body swaps fall under the misc namespace, as opposed to male or female. I don't like it but them's the rules

Base +7, AnonymousCat -6, Megaton +42, b911 -7, Psychotic Pastry +6

You cannot search for misc namespace only. Hell, even if you just use "Show tagged galleries" from here it'll search for "body swap" without namespace.

Base +7, Megaton +42, b911 +7, AnonymousCat +6, Psychotic Pastry +6

Sorry guys, I just tagged it Gender bender along with Body swap so it's easier to find for those who like both.
Usually, when I try to find anything gender-bent like, I just put in Gender Bender and see what comes up. Even if it's body swamp, which I might not be too fond of, there is still a good chance I stumble on something I like. Maybe even translate.
This is just for convenience, no offense to anyone of course.

Base +9, BZFS +6, arennera +8, Megaton +42, Stoicism +6, b911 +7, AnonymousCat +6, conundrum +15, john1980 +9, asdfoiosadf +6, phantominferno +6

https://www.dlsite.com/maniax/work/=/product_id/RJ262633.html

Base +7

@Onthrom not like there's a lot to exclude but if you want to search for M/F body swaps only, you can use

misc:"body swap" -male:"body swap" -female:"body swap"

I think it cuts out 300 or so

Base +9