It's been a couple years since I very first posted this one shot, but I feel that there is something to be said in this.
I don't want people to get the impression that I don't like Matt or Sora, or that Taichi was madly in love with Sora.
I wasn't trying to bash any of the characters, and I don't think that Sorato is a bad couple. And I wasn't trying to say that Sora was lying to herself when she loved Yamato and that he loved her back. The point was that had Sora been a man, so to speak, and told Taichi her true feelings from the very beginning, instead of assuming he would understand that she didn't like him, he could've been saved. And I don't think it's fair to be angry with Matt either, because he really does care for Sora in this one-shot. Maybe not love, but they're just teenagers, they aren't supposed to know real love just yet.
For those that want the underlying story, here it goes:
After Yamato's concert, Sora and he became a steady couple. While it appeared that Taichi understood and accepted it, he hadn't really let go of Sora because he hadn't been told flat out. When he saw how happy the couple was, he felt that his entire history with his two best friends had been erased and became jealous of the close bond they had formed. So he became obsessive and slightly apathetic towards them. He hid his feelings until it was too late to do anything. He felt and was utterly alone because he isolated himself.
The point was to show that people make mistakes and they need to learn how to communicate.