another try, another girl, another ending, another crush. It was in Sakuki's route at the end (after sex scene and dicription of how they spent next day)
I thought, I'll post to let you know :D
Edit: And 1 more thing, somewhere in Kutsu's route the same dubbing line plays during two different Suki's text boxes (in row). In one of meetings with Kutsu, I guess. Sorry I don't remember in which exactly scene it was.
Edit 2(after reading your post under):you did this screen on purpose... Interesting way of showing the game has ended... xD I'm used to something more typical xD , like "good end" in the middle of black screen