His Regular Customer.

Everyday on the way home, a boy stops by the coffee shop. Everyday he orders the same thing, to eat in and watch one of the employers. It's not unconscious, and he knows it's not unnoticeable. He'll allow them to remain strangers only as long as it pleases him.

But it's more than noticed by the boy behind the counter.
His customer is growing impatient...

"Once the afterglow dies away, there's always the cold interlude to endure."

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Despite the tags, all sex is consensual.