Sakura had lived with her grandma ever since her parents died in a car accident when she was three. When she turned fourteen, her grandma also passed away, leaving her alone. Just when she was about to give up hope having a family, out of nowhere, four guys claim to be her older step-brothers. (Source: Esthétique) Included one-shots: Volume 1: Parallel to the World Volume 2: Gakuchuu Volume 3: Mahou no Tsukaikata (How To Use Magic) Volume 4: Himitsu no Tobira no Kugurikata (How to go Through a Secret Door) Volume 6: Santa no Iru Machi Volume 7: Shirayukihime no Douwa (The long tale of Snow White.) Volume 9: Kimi to Boku no Uta

Oniichan to Issho was published in English as Me & My Brothers by TokyoPop from July 3, 2007 to March 2, 2010. It was also adapted into a drama CD published on July 25, 2007.