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.

Note: Includes six one-shots

Volume 10 contains the side story "Oniichan to Issho Kids: Takashi-kun no Kansatsu Nikki" (お兄ちゃんと一緒Kids 武くんの観察日記).
Volume 11 contains the side story "Oniichan to Issho Kids: Miyashita-san Chi no Chrstmas" (お兄ちゃんと一緒Kids 宮下さんちのクリスマス).

Parallel to the World (パラレル TO THE ワールド); LaLa DX 2003-01
Gakuchuu (ガクチュー); LaLa DX 2002-11
Mahou no Tsukaikata (まほーの使い方); LaLa DX 2003-05

Himitsu no Tobira no Kugurikata (ヒミツの扉のくぐり方); LaLa DX 2005-03
Chika Terashima is a 10th grader that wants a prince like in shoujo manga. One day, Chika and her twin brother Shohei switched bodies. Since they both go to a school with only 1 gender, they both have chance to find their true love.

Santa no Iru Machi (サンタのいる街); LaLa DX 2002-01
Shirayukihime no Douwa (白雪姫の童話); LaLa DX 2002-05
Kimi to Boku no Uta (きみとぼくのうた); LaLa Special 2007-08