Quote Originally Posted by Kraco View Post
There's been no indication Nagisa would love Iris even though he sacrificed himself for her sake all the way back when he was a little kid. ...... Like I said before, I suppose it's possible Iris would now suddenly feel something for Nagisa, but I'm not sure you could honestly call it love instead of gratitude, pity, or who knows what.
From the flashback and his behavior in the first few episodes, Nagisa still cares for Iris, even if that is not exactly romantic love. And Iris is hot. Nagisa won't refuse.

Iris's lines in this episode heavily implied that she has feelings for Nagisa (i.e. the whole "why now?" bit). They were really close as kids.