Clint/Natasha Fan Fiction - Clandestine Meetings 

Twenty-four hours before Hawkeye nocks an arrow and aims it at the Black Widow’s forehead, a Timer appears on his skin, ticking down. Twenty-four hours before Clint and Natasha arrive on Vormir, the Timer on his skin resets entirely, ticking down.
Keywords: the avengers, clintasha, black widow, hawkeye, natasha romanoff, clint barton, fan fiction, soulmate au