This is probably the wildest manga I have read as of this year. The story is centers around a non blood related sibling duo who grew up together. Randomly the sister developed affection which came equipped with a yandere side. Even with a handful of chapters, it gets intense and odd real fast to where it will confuse you. I can't really say the character's are good or unique, after all the story is taking it a step further from i_cest even if there is no blood relation. On a random note, people should be aware if real siblings had kids, there would be genetic deformities. So this kindof thing should be kept as a random fantasy thought at most?