Tsubasa: Reservoir Chronicle is a shōnen manga series written and illustrated by the manga artist group Clamp. It takes place in the same fictional universe as many of Clamp’s other manga series, most notably xxxHolic. It was serialized in the Kodansha publication Weekly Shōnen Magazine from May 2003 until October 2009, and was collected in twenty-eight tankōbon volumes. Tsubasa was conceived when four Clamp artists wanted to create a manga series that connected all their previous works. They took the designs for the main protagonists from their earlier manga called Cardcaptor Sakura.
The manga was licensed for English language release by Del Rey Manga, who has released all of its volumes since April 27, 2004. The series has been well received by Japanese and English readers, and it reached high positions on various best-seller lists; the series has sold over twenty million manga volumes in Japan. Both the manga and anime have had positive response from critics, who praised its connections to previous works and its artwork. The plot twists in later parts of the story have resulted in mixed reactions due to positive focus on the impact on the plot and negative one based on how confusing they are.
The plot follows how Sakura, the princess of the Kingdom of Clow, loses all her memories and how Syaoran, a young archaeologist who is her childhood friend, goes on a quest to save her. The Dimensional Witch Yūko Ichihara instructs him to go with two people, Kurogane and Fai D. Flowright. They search for Sakura’s memories, which were scattered in various worlds in the form of feathers, as gathering them will help save her soul. In exchange for the ability to travel across dimensions, Yūko demands that each pay with that they value most: Kurogane offers his sword Ginryū; Fai offers the tattoo that suppresses his enormous magical strength and power; and Syaoran offers all of Sakura’s memories that involve him. Yūko then presents them with a creature named Mokona Modoki that sends the group on a journey across dimensions in search of Sakura’s feathers. After obtaining the first feathers, Sakura awakens from her catatonic state and starts recovering her memories. During their adventures, the group gradually grows closer to the point that Fai jokingly labels them as relatives. As they travel, they learn that the feathers have their own unique abilities and can bestow several supernatural abilities to those who possess them.