For anyone curious: The succubus is the genderbent character. The pictures are from an RPGMaker game where a guy commits suicide, and wakes up as a Succubus but can only interact with men while they're sleeping, so it's pretty much one of those stories where the genderbender element is barely a plot device.
It's a pity, because from what I've seen, the GB comics that involve being transformed into succubi have often had interesting slow transformation elements, corruption/MC elements, or both.