The Third Thread: Beyond Blue Lock

"Even the strongest thread snaps when it's pulled too far."
Everyone knows the Itoshi brothers - prodigies, rivals, two sides of the same brilliance.
But no one knows Yui Itoshi, their twin, the calm hidden between their storms.
While Rin enters Blue Lock to chase vengeance and Sae rules the world stage in silence, Yui chooses a different path - one of analysis, observation, and quiet understanding.
Once a striker herself, she's traded the field for a desk, studying the psychology of geniuses who burn too bright.
But when fate - and Ego Jinpachi - draws her into the Neo Egoist League as an intern, Yui finds herself face to face with the chaos she thought she'd escaped. Rivalries reignite. Rumors spread. And when Shidō Ryusei mistakes her for Rin, the entire Blue Lock world learns that there was always...
a third thread in the Itoshi tapestry.
A story of family, ego, and the thin line between connection and collapse.
She doesn't play the game - she rewrites it.

Disclaimer:
Blue Lock and all original characters, settings, and concepts belong to Muneyuki Kaneshiro and Yusuke Nomura. This story, "The Third Thread: Beyond Blue Lock," is a non-profit fan work created purely for entertainment purposes. Only the original character Yui Itoshi and related content are the author's creation.