[Sannan sighs. He doesn't want to order Heisuke to tell him, but on the other hand, now that he knows, he has to hear the full story or else it will haunt him forever.]

I'm aware of that, but if you're going to say those kinds of things, then you shouldn't leave the details up to my imagination.

[He pauses before adding:]

Who else knows? Besides Nagakura-kun.