Goes without saying to read the manga chapters first, though the Short and Long Summaries for 'Lightning Over Shibuya' are documented on the wiki for a complete descriptive overview of the panel (drawings) styled manga pages so people can tell exactly what is going on.
This wiki, an encyclopaedia to secure information on everything about Seraph of the End makes use of references to help people find specific points in each chapter, as well as technically helpful information such as characters in order of appearance and of course the infobox information.
Helpful, can it be more helpful, just want to read a written summary on everything concerning Chapter 80? Give any and all replies!
ps, is there anything better than the front cover of Shinoa floating peacefully, with the absolute and total carnage of the war zone all around her?