I love the combination of your characters Gerard and Damon...interesting! I really wanna see where you take this and how you portray the character of Damon. The only negative i have is that its a little repetitive, i get that your just trying to emphasise a point, but just keep it in mind when your writing, Subscribing :)
As much as I hate to start off like this, I have to admit that I found both the disclaimer and the links to character pictures in the summary to be a bit unnecessary. This is labeled as fanfiction, so it's safe to assume that you don't own any of the characters that I recognize, and as far as the links go, that kind of annoys me in any story because that's the purpose of the character page.
Moving on to the actual content of the story, I enjoyed how you began by describing all the sensations that Gerard was experiencing, and I also really enjoyed reading the internal monologue that you've written. Though I felt like I could easily hear his thoughts in my head, I did feel like the flow was a bit too choppy at times.
Also, because I'm not familiar with the fandom, I didn't feel like I could get a good grasp on Gerard or Mikey as characters because there wasn't any description included, so I wasn't able to visualize them in my head at all. Granted this is a fanfic, so you assume that the majority of people that read it are going to be familiar with the characters, but that isn't the case.
Overall, I felt like this chapter served as a great opening to the story, and I wish you luck as you continue to work on it.