Inyouchuu Shoku: Harami Ochiru Shoujo-tachi

In this twisted tale, Takeru, Mikoto, and Sui find themselves at the mercy of a malevolent yoma master. As insect-like demons infest their bodies, the trio struggles to break free from the control of the sinister force controlling them. With Takeru's mind consumed by her dark desires for sister Mikoto, can they hope to escape this hellish predicament?