NB. Six more Haikus in my sequence Underground 

XVI

You smile after he 
Hides his wedding ring then slips 
getting off the train

XVII

September darkness
Makes the late running train feel
even much later  

XVIII

He doesn’t wake him up
until he has missed his stop 
smiling silently

XIX

the first train sprints out
infused with an energy
into the sunrise.

XX

You only look at
Each other once you have left
the platform itself.

XXI

After closing the
station he regretted it
once he shut the door.