「せめて、もうまちがえたくないと願いながら。」 (Semete, mou Machigaetakunai to Negai Nagara.)
"Wishing That, At the Very Least I Don’t Make Any More Mistakes."

This series would have finished here if any of our three primary characters had the willpower to directly express their feelings to one another. Whether that's good or bad will vary between viewers.