Cardcaptor Sakura: Clear Card Vol 11

From the Kodansha edition

Seventeen years after the original Cardcaptor Sakura manga ended, CLAMP returns with more magical clow card adventures! The Opposite of Happiness In the middle of art class, something Sakura says causes a giant flower to blossom forth from Akiho and trap Sakura inside! There, Momo reveals her true identity and uses Akiho’s book, Alice in Clockland, to lure Sakura deeper and deeper into this curious world...

Source: Penguin Random House API