Yeah, this is just a bad piece. I enjoy the theme but this was poorly executed, 12 chapters was just not enough let alone through an incest (yuri too?) story. None of the relationships in this story bar one were healthy, everyone seemed to be worse off with each other.
The one thing I found interesting was Kujou's vile form of love. Nearly destroying the future of the one you love and ripping their moral support from under their feet definitely will make her remembered. If just that is the goal of romance then she did it well, but of course that romance is an extremely selfish and harmful one. With a more conventional cast of characters this would have been a very good plot device. Sadly, that wasn't the case.
It's definitely an Ogawa Maiko-esque story. But everything else is far below the level of Hitoribocchi no Chikyuu Shinryaku, her magnum opus.
5/10.