Keita has two older step-sisters, Ako and Riko, consider they aren%u2019t related by blood, they love him within a lustful way. After having a mishap at school, Ako and Riko finally confess their like to him. Keita dislikes thinking about seeing them other then brother and sister, but as he attempts to enter the same school as his sisters, he slowly becomes fascinated by them.  

16-year-old keicho, Suminoe childhood living with two older sisters: twins Ako and Riko. The problem is that they aggregate kin, blood related, and nursing feelings Ako and Riko to his Keicho undergone er... age evolution. Moreover, his own father and mother actively encouraged this desire and insist of keicho carefully "examined" before you make the final choice. Of course, the merry sisters only "" and is ready to facilitate and optimize the