Tenchi Muyo! Daughter of Darkness, or Tenchi Muyo! Manatsu no Eve (Tenchi Muyō Midsummer's Eve) original title, is the second Tenchi Muyo! movie.
This movie is part of the Hasegawa Universe. It appears to take place prior to volume 12 of Hasegawa-sensei's light novels. This is why it appears to contain elements from both the Tenchi Muyo! Ryo-Ohki OVA and Tenchi Universe TV series. Many things come from the OVA, such as the floating hot spring and the new house design, but small differences like the different costumes, the easy application of the Light Hawk wings as a sword weapon, and the inclusion of Kiyone Makibi seem to borrow from some Universe elements.
The film was originally released in Japan on August 2, 1997 as a double feature along with Slayers Great. The film was later released in North America on August 8, 1998 as a DVD by Pioneer Entertainment (later Geneon). In 2010, FUNimation Entertainment rescued the North American license of the film, along with the previous two Tenchi films, and has distributed all three in a Blu-ray/DVD combo pack.