Unbeknownst to humans of the world, two succubus siblings live a peaceful existence in Japan. Their lives are forever changed after a fateful encounter with Yuuki Asuma, a uniquely gifted individual who immediately captures the sisters’ hearts and subsequently guides their uncertain future. Will the sisters’ mutual attraction for the same individual strengthen them together or tear them apart? It is a question Yuuki will ultimately decide…

[From a old review by Nargrakhan]