"CLAMP in Wonderland 2" is a short anime OVA that serves as a celebratory crossover featuring characters from various CLAMP manga series. The narrative unfolds in a whimsical, dreamlike setting where characters from "Cardcaptor Sakura," "Magic Knight Rayearth," "X," "Tokyo Babylon," "Chobits," "Angelic Layer," and other CLAMP works interact in a surreal, interconnected world. The story begins with a mysterious black cat, Kero-chan from "Cardcaptor Sakura," who discovers a magical portal. This portal transports characters into a fantastical realm where they encounter familiar faces from different CLAMP universes.

The central premise revolves around the characters navigating this dreamlike world, engaging in playful interactions and lighthearted adventures. The plot is non-linear, focusing more on the joy of seeing beloved characters from disparate series come together rather than following a traditional storyline. The OVA is structured as a series of vignettes, with characters from one series often crossing paths with those from another, creating a sense of unity and shared continuity. For example, Sakura Kinomoto from "Cardcaptor Sakura" meets Hikaru Shidou from "Magic Knight Rayearth," while Syaoran from "Tsubasa: Reservoir Chronicle" interacts with characters from "X/1999."

The tone is light and celebratory, emphasizing the charm and nostalgia of CLAMP's expansive body of work. The OVA includes musical sequences and dance numbers, further enhancing its festive atmosphere. While there is no overarching conflict or deep narrative progression, the focus remains on the characters' interactions and the visual spectacle of seeing them united in a single, imaginative space. The OVA concludes with the characters returning to their respective worlds, leaving the viewer with a sense of whimsy and appreciation for CLAMP's creative legacy.