君の気持が私にないことを知ってしまったから。せめて今だけ、ほんの少しだけ、独り占めさせてね。
私の、最初で最後のわがまま。

I know you don't have any feelings for me. So at least for now, even if just for the shortest while, let me have you all to myself.
This is my first and last selfish wish.