Tokyo is abuzz with persocoms – humanoid computers that are virtually perfect. The socially and technologically inept Hideki is dying to get his hands on one. When he finds Chii abandoned in the trash, she’s cuter than any current model he’s ever seen before. But when he gets her home and turns her on, she has no data and only a single learning program installed. While Hideki puts his whole heart into teaching Chii the ins and outs of humanity, a mystery unfolds as a dark secret within her awakens.
Kimihiro Watanuki is a high school student plagued by ayakashi spirits, both of which are invisible to everyone else but him. The series begins when Watanuki stumbles, seemingly by chance, into a shop that grants wishes. The shop is owned by Yūko Ichihara, a mysterious witch of many names and esoteric renown. For a price, she offers to grant Watanuki's wish to be rid of the spirits. The price, according to Yūko, must be of equal value; so, as payment, he must become Yūko's temporary, part-time cook and housekeeper.
סאקורה קינומוטו היא ילדה רגילה הלומדת בכיתה ד'. יום אחד נכנסה סאקורה לספריה של אביה, שם מצאה את ספר קלפי הקלאו. בתוך הספר היא מגלה ערימת קלפים, כאשר סאקורה מרימה את הקלף העליון בערימה, קלף הרוח, וקוראת את שמו, כל שאר הקלפים עפים ומתפזרים בכל האזור. יצור בשם קרברוס שנראה כמו דובון קטן יוצא מכריכת הספר ומספר לה שעליה למצוא את כל הקלפים שעפו וללכוד אותם בטרם יפול אסון על העולם, כך סאקורה הפכה רשמית ל-"לוכדת קלפי הקלאו". היא מתחילה לאסוף את קלפי הקלאו, יחד עם חברתה הטובה טומויו ועם שאורן ומיילין לי.
Three young girls, Hikaru, Umi, and Fuu, are transported to a magical world called Cephiro during a field trip to Tokyo Tower. They are soon greeted by Master Mage Clef, who explains to them that they have been summoned to become the Legendary Magic Knights and save Cephiro. The girls are less than enthusiastic about this idea, and only want to return home. Clef further explains that they must seek out the three Rune Gods to help them fight. He bestows armor and magical powers to each of them. They learn from Clef that High Priest Zagato has kidnapped the Pillar of Cephiro, Princess Emeraude. The Pillar of Cephiro has the sole responsibility of keeping Cephiro alive and in balance with her prayers. Without Princess Emeraude, Cephiro would fall into ruin. Hikaru, Umi, and Fuu must fight off Zagato's henchman and find the Rune Gods if they ever want to get back home. They soon learn that friendship and loyalty are the only things they can rely on in the crumbling Cephiro.
CLAMP School has the size and resources of a small city. Over 10,000 people—students and their families—live, work, and study within its self-sufficient campus. Any student with talent, regardless of wealth, is gladly accepted into this amazing facility. Covering kindergarten through graduate school, it is without equal anywhere in the world. Nokoru Imonoyama, Student Council President of the Elementary School Division, as well as the Treasurer, Akira Ijūin, and Secretary, Suō Takamura, are three of the most well-liked and idolized students in school. Nokoru decides that he and his two friends are going to start a detective service, solving any mystery or crime, great or small. But, as Nokoru is a bit theatrical and a shameless romantic, he declares that these detectives will focus on aiding mostly girls and women. With all the resources the school has to offer at their disposal, the CLAMP School Detectives are on a mission to help damsels in distress.
12-year-old Misaki Suzuhara has just gotten involved in Angelic Layer, a battling game using electronic dolls called angels. Even as a newbie, Misaki shows advanced skills as she meets new friends and enters Angelic Layer tournaments to fight the greatest Angelic Layer champions of the nation.
Yūko Ichihara is the sexy owner of a strange store which offers to make any wishes come true for a price. Kimihiro Watanuki has a special type of blood that attracts spirits and ghosts. He goes into the shop owned by Yūko Ichihara and asks her to get rid of the spirits. Yūko offers to do so if he works part-time at the store.