Unreal Genius is the fifth volume of the No Need For Tenchi! manga series, written and drawn by Hitoshi Okuda.
From the back cover of the Viz Graphic Novel:
The depths of space in No Need For Tenchi! are full of tough, bold men and tough, big-haired women. But it's those teeny, tiny people with the planet-sized brains you really need to watch out for. Compared to them, most people have the IQ of Ryo-Ohki's carrots. They're different from the other people...better! They're Washu and Yume, and they've got the UNREAL GENIUS!
As Tenchi and the gang head to try and rescue Asahi's father, master woodcutter Takebe, from the clutches of his rival Tatetsuki, little do they suspect that mind control is behind the plot...or that they're soon to meet the mysterious Yume: the mind behind the mind behind the mind! (Well, Washu knows, of course...but she thinks there's some knowledge her friends aren't ready for!)
Chapters
In the English graphic novels, each chapter is numbered and preceded with the phrase "Tales of Tenchi." However, each volume restarts the numbering, replicating the number of each of the comic books as originally published by Viz.