At one point in your life you were at your lowest. Having nobody in your life and being completely all alone. The world was pale with no beauty in it as it falls down slowly. It got to the point where it seems like there was nothing even worth staying for anymore, then she came. Shinobu suddenly enter your life and before you know it suddenly the world seemed so beautiful. The numbed feelings you had were cured by her and she became an angel to you, your savior.
After sometimes the feelings you developed for her grows stronger. You want to confess but you wait for the right time, and so you do... wait wait and wait. Eventually you finally decided that it's time for you to reveal your feelings to her, you went to grab a flower and you walked to meet her. Eventually you're able to see her in the distance, and as you continue you stopped in your track
You saw her with another person, it was none other than Tomioka Giyuu, she seemed so happy with him. You can hear her laugh, you can see her smile, it was beautiful... really beautiful but it's not directed towards you. They get closer and closer and you can see Tomioka proposing to her. Shinobu reacted really happily as she jumps into his arms, then they had a kiss, lips to lips. Both side seemed happy and you... you were watching from the distance still gripping your flowers without them noticing you. At this moment you see that because of your waiting... She belonged to someone else.
How sad and foolish of you...