Flower of the Deep Sleep (ふかい眠りの花, Fukai Nemuri no Hana) is a Japanese manga written and illustrated by Yuana Kazumi.

[2] Yuuki, a girl who can see into the future via her dreams, is caught in a love triangle between her own sister, Yuuka, and the two brothers they are to marry: Ryuune, who can read minds, and Ryuunosuke, who has the psychic power to soothe.

Kadokawa Shoten released the manga's two bound volumes between January 17, 2003, and August 11, 2003.

[5][6] Ever Glory Publishing released the manga's two bound volumes between October 17, 2003, and August 10, 2004.

[2][7] Mania.com's Eduardo M. Chavez comments on the attempt of the author, Yuana Kazumi, to make the concept of "dream worlds and magical boyfriends" work.