ソードアート・オンライン 21 ユナイタル・リングI [Sōdo āto onrain 21 Yunaitaru Ringu I]

Set in a world where virtual reality gaming has evolved to unimaginable heights, this installment of the series dives back into the lives of Kirito and Asuna following a year of relative peace. Their adventures take a thrilling turn as they discover a new game called "Unital Ring," which merges various popular gaming worlds into one expansive universe. However, this new realm is fraught with challenges that test their abilities and the strength of their bond.

As they navigate this intricate and dangerous landscape, the duo encounters both familiar faces and formidable foes. The stakes are higher than ever as the boundaries between friendship and rivalry blur in the face of both personal and societal conflicts. With each encounter, Kirito and Asuna must confront their past while finding a way to adapt to this unprecedented gaming experience. It is a journey filled with action, camaraderie, and deep emotional resonance, all while exploring the essence of what it means to be a hero in a digital age.