Why is "List of Tsubasa: Reservoir Chronicle episodes" trending?

Wikipedia Overview

Tsubasa: Reservoir Chronicle, a manga by Clamp, has been adapted into four different anime versions between 2005 and 2009, including a two-season anime television series, an anime film, and two original video animation (OVA) series with screenplay provided by Nanase Ohkawa and music composed by Yuki Kajiura. Bee Train adapted the manga series into a fifty-two-episode anime entitled Tsubasa Chronicle directed by Kōichi Mashimo with Hiroshi Morioka joining on as co-director for season two. Hiroyuki Kawasaki scripted both seasons. Production I.G adapted the manga series into both an anime film entitled Tsubasa Chronicle the Movie: The Princess of the Country of Birdcages directed by Itsuro Kawasaki and two OVA adaptations directed by Shunsuke Tada entitled Tsubasa Tokyo Revelations and Tsubasa Shunraiki. Set in a fictional universe involving alternative realities, the story follows a group of five travellers—Syaoran, Sakura, Kurogane, Fai D. Flourite, and Mokona—as they search for fragments of Sakura's memory that take the form of feathers of great power and without which, Sakura will die. The series features much crossover with its sister series xxxHolic, another manga by Clamp.