Hideki's a decent guy overall and realises it's a bit perverted to have his girl persocom running around the place with no underwear. Unfortunately, inexperienced as Hideki is, buying female undergarments holds a great source of embarrassment for him. Hearing about the dilemma Shinbo offers Sumomo's services as navigator and generally being a source of common sense for Chii, in order for her to go and buy her own underwear. This sounds like a great idea at the time, but causes a seemingly infinite amount of worry during the day at prep school for Hideki.

Yumi's dad loans Hideki his DVD player, and tells him of a DVD sale coming up. Hoping to get some mature videos, Hideki embarrassingly meets Minoru and sis instead, who offer him a fantasy multiplayer Internet game (Brave Quest Online) that persocoms can play too. Hideki thinks this would be fun to play with Chii. But Hideki knows nothing about hooking up to the internet! Fortunately Shimbo helps him out. Now everyone's logged on, except for Chii; she's missing (in the game)! Oh no, what's Hideki going to do now? Blindly run through the game looking for her of course!

Hideki's in trouble grade-wise, so Ms. Shimizu advises he prepare for a practice exam. Hideki gets ready for studying, but loses his wallet. Chii tries to help him out by cooking for him.

Following the events from the previous episode, Hideki responds to Chii he also loves her. At this point, something triggers in Chii, and she flies out of the apartment window and onto the roof of the building. Zima and Dita, two advanced Persocoms who had been observing from a distance, wait nearby intending to stop Chii from launching her supposed hidden program that they fear will destroy all Persocoms.