The Calibrator (itoshi sae x my/n)

In Re Al in madrid, Itoshi Sae is untouchable, precise, ruthless, and perfectly in control.

You are the only one allowed to tell him when to stop.

As his physical and analytical trainer, your job is simple: keep a prodigy from destroying himself. You measure his limits, correct his form, and stabilize what the world calls genius.

Then Jinpachi Ego borrows you for Blue Lock.

What was once control becomes distance.
What was professional begins to fracture.
And Sae Itoshi who trusts no one must confront what it means to lose the one person who keeps him balanced.

Between ego and restraint, ambition and attachment, this is the story of the one who doesn't sharpen the blade

"He keeps it from shattering."