In the near future, augmented reality has become a key part of daily life. A gentle middle school girl named Yuuko "Yasako" Okonogi and her family have just moved to Daikoku City despite rumors of people disappearing. There, her grandmother, nicknamed "Mega-baa," runs a shop called Megasia that specializes in illegal tools which interact with parts of the virtual world. Mega-baa also hosts an unofficial detective agency called "Coil," a group of children around Yasako's age who find and handle corruption of the virtual world. Yasako gets involved with the group when Fumie Hashimoto, a playful member of Coil, helps rescue her cyberdog Densuke after getting trapped in virtual space while chasing a mysterious virus. Also investigating these corruptions and viruses is an abrasive hacker named Yuuko Amasawa, who the others take to calling Isako. Can Coil discover the truths behind the mysterious viruses and corruption, and if they can, at what cost? [Written by MAL Rewrite]

At a remote hot springs lodge, Yona and the team rest. The boys are taking a bath with the exception of Ki-ja, who looks troubled. Jae-ha takes this chance to tease him, unwittingly finding a mark linked to the previous White Dragon—whom coincidentally is also Ki-ja's father—prompting Ki-ja to recall their complicated relationship. In another time and place, Son Hak and the dragons banter as they hold a drinking contest. As they start to doze off one-by-one, Zeno dreams of his past, where his abilities and experiences, both as a person and as the Yellow Dragon, are revealed.

Spring has finally arrived in Moomin Valley, giving way to another great adventure for Moomintroll and the rest of its inhabitants. With Snufkin coming home from his winter migration, the locals of the valley finally begin to rise from their hibernation. Finding a mysterious hat, the Moomins cannot bring themselves to throw it away due to its fine quality, instead hoping to eventually find its owner. While playing games with his friends, Moomin tries to hide in the silk hat. When his friends come looking for him, they are shocked to discover that Moomin has transformed into a hideous creature. Examining himself in the mirror, he is disgusted to find himself completely unrecognizable. Transforming back to normal after scaring his friends and family, Moomin and Snufkin decide to toss the hat in the river. As it drifts away, they begin to wonder who the hat belonged to and whether its owner will return for their lost possession.

The final movie of a four-part finale of Tamayura.