(Well, that's definitely a reaction and Tsurumaru stops what he's doing for a moment to watch Ichigo. He really watches him, gold eyes taking in the way he looks away, the flush on his cheeks, and when he touches his shoulder...

He understands.)

It isn't a bother.

(And now it's his turn to look away. He lowers his head, feeling a little guilty. Everyone has their secrets, including himself, and he tries to respect that but in the moment, he'd learned Ichigo's without permission....)

Do you remember the battle, Ichi? Before you were struck?

(To give Ichigo some space, he sits back, his back straight and head down to look at the hands folded neatly in his lap as he recounts the last moments,)

We were attacked suddenly from behind and I happened to turn just as you were hit.

(...)

I was behind you, Ichi. I saw the blade slice into your back. (And it was then that he saw what he thought were scars.) I made sure no one else would see...

(He'd thrown his cloak over him to hide the scars from everyone else. He still saw the scars, though.)

... I'm sorry.

(He never meant to learn Ichigo's secret.)