Sleepless Domain is an ongoing American webcomic and graphic novel series created by Mary Cagle and published by Hiveworks.

The series is set in a secluded city perpetually threatened by monsters, where young women known as magical girls are tasked with defending the population.

The comic has garnered attention for its character development, subversion of traditional magical girl tropes, and exploration of complex themes such as grief, trauma, and the pressures faced by young heroines.

While initially pitched as a "magical girl elimination reality show" similar to Survivor, the final comic deviated significantly from this concept.

[3] Cagle has cited Puella Magi Madoka Magica as an influence on the comic's themes, but also expressed a desire to explore the idea of recovery and moving on from tragedy.

[11] Sleepless Domain has been recognized by critics for its innovative take on the magical girl genre and its exploration of complex themes including grief and trauma.

[11][12][13] Publishers Weekly called the series a "sinister flip side to the oft-sweet magical girl genre," and praised its exploration of survivor's guilt, power dynamics, and exploitation.

[11] Kotaku also noted the contrast between its light-hearted art style and its somber themes, describing it as a tragic story about "loss of fellowship.

[13][17] ComicsXF compared Sleepless Domain favorably to other dark magical girl stories regarding its portrayal of sensitive topics, noting that rather than glamorizing the characters' trauma, the comic emphasizes healthy coping mechanisms and the importance of finding support.