On The Fence (слэш)

'You fence?' John didn't know why he was surprised, not when it made such perfect sense. 'Well enough to become Cambridge champion?'
'No.' Sherlock didn't look up from his phone. 'Well enough to be British Champion.'
The murder of the King's College fencing champion leads to revelations about Sherlock's past. Will it be the point that tips them from friends to lovers, or will they remain on the fence?