"And like a ghost in the silence I disappear, Don't try to fight the storm, You'll tumble overboard, Tides will bring me back to you."

"and with all of the strength he could put behind it slammed the other man's face into the wall." This is a story that starts out being about Demyx and Xigbar, although there is eventual Zemyx in it as well. You just need to read to find out what happens.