Keita has two older step-sisters, Ako and Riko, but since they aren't related by blood, they love him in a lustful way. After a mishap at school, Ako and Riko finally confess their love to him. Keita dislikes the thought of seeing them other then brother and sister, but as he tries to enter the same school as his sisters, he slowly becomes attracted to them.
Anime is hentai... I dont really understand why did they published it as an anime but OVA of Kiss x Sis was rated as hentai and anime wich is 3x times more pervented and erotical is rated as anime LOL will never get it sooo....
If you like hentai (I do) and you like echi anime(lol who doesnt) or searching for something more than anime Kiss x Sis is what you need ! Animation is actualy hentai style and is as always EXTRA GOOD (lol total hentai style) . Story it is nice and quite romantic ( well i did like it) actualy sometimes very unexpected thing happen =^_^= . Well this anime is entertaining mostly in erotical style but there is also much humor here too and it is really funny . Emmm what can i say more dont get too turned on when watching cause there will be moment wich could definitely do that ... Higly recommend to watch for all hentai lovers and 18+ people.
NOT FOR KIDS EVEN IF THIS IS ANIME IT IS NOT FOR KIDS ! really 18+ =^_^=