That's because it IS Succubus Master. All of this devs games are built the same way, a story is taken word-for-word (give or take a name change) and chopped up between grind sections. They list the authors on their website, at least, so that's nice.
That explains a lot actually. Like for example how the text makes it a whole plot point how the succubus disliked her old physical form and the mc gives her a new appearance as part of a bonding ritual - and then all the media portraying the succubus still use the same actress as before. Or why the story tells me that now as a cambion the mc has near infinite sexual stamina, but the actual game mechanics tell me "boy oh boy, I hope you came prepared for this! You'll have to raise the succubus' lust by chastely kissing her once per day. But this will drain your stats faster than you can compensate for in a single day!"
Also it is just plain stupid that you can miss stuff by waiting. You'll have a quest like "be in your room at night (no stat requirements)". So you go to your room and wait for the night. Nothing happens. You need to actually enter your room from somewhere else at night for the quest link to appear in your room.
Took quite a bit of frustrated clicking around to figure that one out.
