While Hideki, Minoru, and Ueda (Chi's manager at Tiroll) frantically scour the entire city for poor Chi, Ueda shares a personal story about the Persecom dear to him.
With the utterance of his true feelings for Chi, Hideki unknowingly triggers a special program so powerful it will affect the future of all Persecoms and their owners.
To avoid confusion or embarrassment, Hideki sends Chi to the lingerie store to buy some underwear. With child-like wonderment, Chi's exploration of the city results in quite an adventure.
Chi is home safe, but Hideki notes something new between them. Minoru continues his relentless search for more information on the mysterious Chobits. Despite Hideki's violent contempt, Dragonfly eagerly - and apologetically - offers his help.
With no warning, Shinbo disappears, leaving Sumomo under Hideki's care. When Hideki gets to school he realizes Ms. Shimizu is gone, too! When Shinbo finally calls he better have a good explanation.
Persecoms are humanoid computers that can do almost anything humans can. Virtually everyone in Tokyo has one but Hideki, a displaced country boy going to a college prep school. His life is about to change when he finds a very special one in the trash.
Hideki takes a week off from work to study for a big test. But when he loses his wallet, growls from his empty stomach ruin all hopes of concentration. Determined to help her master, Chi goes on a mission to cure his hunger pangs.
Anxious to analyze her, Chi's abductor, who goes by Dragonfly on the web, connects her to a room full of his custom models. As he trespasses on forbidden territory, Chi's dark side gets physical to disable his attempts.