Don't go blaming yourself! If you'd done that, then you wouldn't be alive to remember ANYTHING, let alone everything. I'm sure you did the best you could do at the time--well, at any of the times. No one expects any more than that from you.

[Dammit, Hiroshi doesn't deserve this! That's it, there has to be a way to untangle the knot of causality he's tied up in!]