For a few seconds all they could hear was the buzzing in their ears, as they laid there in post-coital bliss. After it passed, still lying in each other's arms, John on top of Sherlock, they heard the low popping sounds of the fireworks outside. They turned their heads in the direction of the windows, but they couldn't see anything from the bed. Not bothering to move an inch, they turned back, gazing into the other's eyes they shared a kiss.
„Happy new year" stated John, lips almost grazing Sherlock's in the process.
„Happy new year" repeated Sherlock after John in the same manner.