Doom Time is the second volume of The All-New Tenchi Muyo! manga series, written and drawn by Hitoshi Okuda.
From the back cover of the Viz Graphic Novel:
It seems like only yesterday when a young Tenchi Masaki inadvertently freed a feisty space pirate named Ryoko from her earthly imprisonment. In short order, the teenage boy was beset by a riot of cute but quarrelsome gals from outer space.
Now, living under the same roof, Tenchi and his pals spend their time flirting, bickering and squashing evil villains.
This time, the fun begins when Washu invents a device to alter time and Mihoshi finds herself in the middle of a bank robbery. Naturally, things go awry quickly.
Even little Sasami finds herself in trouble when cute (and hungry) robots invade her school. Later, when everything seems to be getting back to normal, her doting and overly protective father starts threatening to kill her classmates.
And finally, the whole gang must unite to battle an evil replicant of Washu, the greatest genius in the entire universe. If they're not careful, this could be the end of The All-New Tenchi Muyo!
Chapters
In the English graphic novels, each book restarts the chapter numbering from "Chapter One," rather the continuing chapter numbering from book to book as is standard in the Japanese release. In North America, Viz also originally released the "Doom Time" chapters as separate comic books as The All-New Tenchi Muyo: Part Two, so the chapters correspond with the issue released. However, these were the last stories published as single issues.