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.
Guy gets bullied into suicide and is reincarnated as a succubus by "god" to get revenge on his bullies. Gameplay is reading "dream diaries" that chronicle the lives of the bullies for the years following MC's suicide; in order to reach the men in their dreams you need to find the colored word in the diaries and enter that word in kana as a password to the door in each man's dream (i.e. if you don't know Japanese good fucking luck). Once there MC does succubus things: you can either kill them (which results in a game over lul) or stop before killing them but draining their energy and willpower so that their real lives are ruined. 2 H scenes for each guy, afterwards MC, satisfied with their work, goes off to live the succubus life.
Boring gameplay, and kind of unsatisfying that going "all the way" and killing the men results in game overs.