What happens when a very surprised Grell answers the door to see a very battered and bruised William there after a nasty ambush following a supposedly routine job? The best thing would be to relax but making a work enthusiast like William relax even after being hurt so badly would be no easy task, especially when it's up to Grell to try and coax him.

This is just some adorable little story between Ciel and Sebastian that popped in my head when I saw this picture. Just fluff, no lemon, sorry :(