Until Death Do Us Part

 is an original manga written by Hiroshi Takashige and illustrated by DOUBLE-S. The 214-chapter manga was published over the course of 10 years.

Collaboration with Kyouichi Nanatsuki
Hiroshi Takashige and Kyouichi Nanatsuki were both participants in Hero Cross Line (HXL), a collaboration between several authors, artists, and publishers to create a large superhero fictional universe. While Until Death Do Us Part is set in a parallel universe of the HXL universe, it is set in the same world as two of Nanatsuki's previous manga, JESUS and Aegis in the Dark, and adopts various characters and settings from them.

The collaboration began around halfway through the series, starting with Tate Karito's introduction in the Kakuhoukai arc. The Aitou Academy arc was co-developed by the two authors, with Takashige introducing several characters who are featured in Nanatsuki's sequels to his manga, Aegis in the Dawn and JESUS Sajin Kouro. In particular, JESUS Sajin Kouro expands on Aitou Academy, why Jesus is there, and the remnants of 24. The manga ends with the permanent destruction of 24 as mentioned in UDDUP Chapter 154.

Chronologically, the Nanatsuki-Takashige universe follows this order:
 * 1) JESUS
 * 2) Aegis in the Dark
 * 3) Until Death Do Us Part (Beginning to Aitou Academy arc) / Aegis in the Dawn / JESUS Sajin Kouro
 * 4) Until Death Do Us Part (Prelude to the Final Battle to Epilogue)