do you have recs for me?

my dear f-list,

i somehow got interested in severus/sirius
and i wonder if there are any good fics where i SHOULD start with this pair

i like happy ends, but drama and major angst and gore is fine with me, though i would prefer nobody dies, sometimes they do and that is also fine...
just any MUST READ severus/sirius fics would be awesome

thank you
<3