A Computer Software named IR recruits Yui as a Corrector. He takes her inside a computer, where she sees her father's newest creation, ""Galaxy Land"". While at Galaxy Land, IR downloads ""The Element Suit"" which is found somewhere in Galaxy Land, Yui transforms. Grosser sends on of his cohorts out, War Wolf. Can Yui defeat Grosser? Why not pick up a copy of Corrector Yui: Volume 1?
Yui finds out that IR wasn't a dream after all! She trys sending a message to her friends, but with the help of IR, she sends it by Comnet Mail. At school, Yui is asked a question she does not know, ""The Mouth Is The Gateway To Disaster"". Freaking out, Yui is forced to go to the Virtual Comnet World, with the command ""Corrector Yui Enter!"" While in the virutal world, Yui discovers that one of Grosser's Cohorts, Virus has infected the mailmen, and the messages that everyone sends is turned into something nasty. When Yui returns to the real world, she finally has the answer to the question, which she types in her computer. The answer is correct. After that, Yui and her friends go to Haruna's Birthday Party.
Yui and IR suspect foul play when Chef Kirch, a family friend who can never get his recipes quite right. In the beginning if he mentions he has a new dish everyone wants to run for cover! Yui unable to turn down a friend tries it. Its actually good! He found a recipe on Comnet and a special seasoning has him with more customers than he can handle. Soon it gets out of hand and he has to face customers who've turned into ravenous zombies.
A school-craze for fortune-telling develops into a destructive obsession. Who knew love advice could be so dangerous?
A virtual-reality field trip into a nature park turns a day picking up litter into an all-out search for missing people. Can Corrector Yui save the day... and finish her homework?