OniAi (お兄ちゃんだけど愛さえあれば関係ないよねっ, Onī-chan dakedo Ai sae Areba Kankei Nai yo ne!, lit. As Long as There's Love, It Doesn't Matter If He Is My Brother, Right?), is a Japanese light novel series written by Daisuke Suzuki, with illustrations by Gekka Urū. The series is published by Media Factory and since December 2010 there have been 10 volumes released. There are two manga adaptation series, both serialized in Media Factory's Monthly Comic Alive magazine. An anime adaptation by Silver Link aired in Japan from October 5 to December 21, 2012.
After 6 years of living apart due to the death of their parents, the Himenokōji twins, Akito and Akiko, are finally reunited when Akito desires to live as a family once more. Although things are fine at first, Akiko begins to express her incestuous love for her older brother, who only sees her as his little sister.
OniAi started as a Japanese light novel series, written by Daisuke Suzuki, with illustrations by Gekka Urū. The series is published by Media Factory under their MF Bunko J imprint. The series' first volume was released on December 21, 2010, and as of March 25, 2014, there have been 11 volumes total. A drama CD was released bundled with the limited edition of the seventh volume, published on September 22, 2012.