Sadly, There is no sequel to Chobits. However,If toi have been collecting the volumes of the montrer on Dvd and have collected 1-6, toi are most likely talking about Chobits volume 7 Chat Room which is just Lost episodes filled with flashbacks of things we've already seen happen. However, It is not all bad becuase it includes the special short,Chibits. And there is also a fanfiction called Chobits 2 which some of them are posté on this site.But, if toi are not talking about those there is no sequel, and if toi are sure there is,GOOD LUCK FINDING ONE.