Kiss×sis (stylized as kiss×sis; pronounced "kiss sis") is a Japanese manga series written and illustrated by Bow Ditama.

[3] Keita Suminoe is a third-year Japanese middle school student living with his father, stepmother, and older twin stepsisters, Ako and Riko.

Nowadays the trio see their opposites in a noticeably less platonic fashion; Ako and Riko frequently flirt and lust after Keita while, much to his stress, he fights the urge to give in to them.

[23] Kodansha collected its chapters in twenty-five tankōbon volumes, released under their KC Deluxe imprint, from September 6, 2007,[24] to November 18, 2021.

[27] On December 22 of that year, the first OVA was released, bundled with the third volume of the manga, directed by Munenori Nawa.

[30] The opening and closing themes for the OVA include "Our Honey Boy" (ふたりのハニーボーイ, Futari no Hanibōi) by Ayana Taketatsu and Yuiko Tatsumi and "Starry Sky Story" (星空物語, Hoshizora Monogatari) by Nana Takahashi, respectively.