Kiss x Sis is a oVA anime that premiered in winter 2009, produced by feel..

About the production: the story comes from a manga, there are 12 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy, ecchi and romance, with themes such as Inseki, Female Harem, Twins and Nudity.

On AniList, Kiss x Sis has an average score of 62%, an average score, and appears on 80,106 users' lists.

Keita is studying hard for a high school entrance test, but his two beautiful elder twin stepsisters are a constant distraction. Though they mean well, Ako and Riko are also extremely sexually assertive and interested in Keita. At first, he fends them off, but little by little, with each kiss, Keita becomes close to both twins until a forbidden love triangle develops. Will taboo-breaking love bloom between two of them... or will Keita at least get into high school?! (Source: Discotek Media)

Official synopsis from AniList.