Dual and Dorothy, faithful computer antivirus programs, monitor and constantly scan for corruptions in the simulated worlds of the Box of Wisdom. Whenever a virus is detected, it—and in many cases the entire world as well—is forcibly purged. This routine occurs every day without change, until the deletion of a particularly large virus cluster reveals an unknown program—calling herself Remo—with no memory of her function. She offers a fresh perspective into the monotony of Dual and Dorothy's lives as her influence causes the two programs to realize that there is more to life than just their mission. No longer spending their time only watching over the worlds, the three girls start truly experiencing them. As they explore digitally recreated cities and landscapes, Dual and Dorothy develop a special appreciation for what they have, all while searching for clues regarding Remo's forgotten purpose.

The series is set in a near-future world where the boundary between human being and AI is vague. A rapid biological evolution, similar to Cambrian Explosion, is caused by one incident. This incident turns into the genesis of a new jostle for supremacy, and the influence of the evolution goes beyond biological framework and spreads to various kinds of materials and technologies. The era of massive evolution involving diverse existences, such as human, machines, and biotechnologies, is coming. Characters fight an existential war in such a world. (Source: ANN)

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 verdant, peaceful country of Simulacrum resides on the planet of Daikuuriku. The country owes its existence to flying machines called Simoun and their holy Sibylla pilots. Powered by ancient artifacts, these ships can utilize Ri Maajon, frighteningly powerful abilities that can tear the very sky apart. Aaeru is a wilful girl who joins the ranks of the Sibylla priestesses at Chor Tempest in hopes of being able to pilot a Simoun one day. But soon after she enlists, Simulacrum is plunged into a war, as hostile nations desperately try to claim the technology for themselves. Hoping to save their respective lands from doom, these nations at peril believe the Simoun are the key to preventing disaster. Now struggling against their enemies and dealing with personal losses, the girls of Chor Tempest have no choice but to adapt to their situation if they are to have any chance at unraveling the mysteries that lie at the heart of their country: the Simoun and the Ri Maajon.