Ren'Ai Shindan - Detailed Summaries/Translation

This is going to take me a /long/ time. And may be more than one post. But... here goes.
This post and any subsequent related posts will contain detailed spoilers for the various arcs of the "Ren'Ai Shindan" drama series.
Warnings for the series in general include: Boys' Love (gayness), Girls' Love (lesbians), Violence, Partial Nudity, Implied Sexual Situations, Implied Sibling Love, Character Death, Serious Illness, Mental Incapacitation and Un-subtle Symbolism.
( Episodes 1-3, Tsubasa no Kakera )