Yeah, unfortunately that isn't what was supposed to show up, but it won't be a problem in the full version. I'm sorry that happened.
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