Margin of Error ☆ Tsukishima Kei

Aisa Nozue never intended to return to volleyball. Not as a player, and certainly not as an assistant coach for Karasuno. But when Ukai sees her analytical mind as an asset, she finds herself back in a gym she never planned to step into.

Reserved, sharp, and always three steps ahead, Aisa isn't here to make friends; Especially not with Tsukishima Kei, whose dry wit and calculated detachment mirror her own a little too well.

What starts as indifference quickly shifts into something neither of them can define: a rivalry of logic, a quiet competition, and an unspoken understanding that neither is ready to acknowledge.

Because in the game of margins and milliseconds, the biggest miscalculation is underestimating each other.