[Ayumu's silent for several moments after Hizumi speaks, fiddling with his sandwich in an uncharacteristic manner. He wasn't one to play with his food at all, so it's a clear sign of some degree of unease on his part.

Eventually he sets his sandwich aside, giving up on his food.]

I'd be lying if I said I was. I.... that wasn't a person I wanted to be.

[A grimace at the memories, before he continues. He was far from happy with what he'd done.]

But you're the one I should be asking that question, I think.