[He just has an excellent poker face, Fukawa, he's still a normal person.]

That's right. At the time, Dazai said "I just feel like if we don’t take a picture now, there won’t be another chance for us to leave behind evidence that we used to come here together."

...Dazai is hardly ever wrong.

[That doesn't make him feel good about how this game will turn out for him or for anyone.]