"K: Seven Stories" is a collection of six films and one recap movie that expand on the lore and characters of the original "K" anime series. The films serve as both prequels and side stories, delving deeper into the backgrounds of key characters and factions within the universe. The narrative is set in a world where individuals known as Kings wield immense supernatural powers, each representing a different clan with unique abilities and ideologies.

The first film, "R:B ~Blaze~," focuses on the Red Clan, HOMRA, and explores the relationship between its leader, Mikoto Suoh, and his right-hand man, Totsuka Tatara. The story reveals pivotal moments in their past, including how Totsuka joined HOMRA and the bond they shared before the events of the original series. The second film, "SIDE:BLUE ~Tenrou~," shifts to the Blue Clan, Scepter 4, and centers on Reisi Munakata and his lieutenant, Seri Awashima. It provides insight into their early days as leaders of the clan and their struggles to maintain order in a world of chaos.

The third film, "SIDE:GREEN ~Uwabami Greentile~," introduces the Green Clan, Jungle, and its enigmatic leader, Nagare Hisui. This installment explores the origins of Jungle and its role in the power dynamics between the clans. The fourth film, "Lost Small World ~Orioto~," delves into the backstory of Yashiro Isana, also known as Shiro, and his connection to the Silver Clan. It reveals his past as a researcher and the events that led to his amnesia and subsequent involvement with the clans.

The fifth film, "Memory of Red ~BURN~," revisits HOMRA and examines the aftermath of Mikoto Suoh's death, focusing on the emotional impact on his followers, particularly Anna Kushina. The sixth film, "Circle Vision ~Nameless Song~," ties together various threads from the previous films, offering a broader perspective on the interconnected fates of the clans and their members. The final installment, "The Idol K," is a recap movie that summarizes the events of the original series, providing context for viewers new to the franchise.

Throughout the films, recurring themes of loyalty, power, and identity are explored, with each story contributing to the overarching narrative of the "K" universe. The characters' motivations and relationships are further developed, offering a richer understanding of their actions in the original series. The films maintain the same blend of action, drama, and supernatural elements that defined the original, while expanding on the world-building and character arcs.