Out of Time (слэш)

John was Sherlock’s friend with benefits, but for John… Sherlock was everything. Only… Sherlock is a alpha and John is a beta. John always knew this arrangement between them couldn’t last. One day Sherlock would find an omega to mate with and then he’d have to let Sherlock go, no matter how it would destroy him. Omegas were the intended bond mates to alphas. Being a beta, John knew he held no place in Sherlock’s life, apart from being a second, and that would destroy him. That dreaded day came too soon. John was left with two choices... Become Sherlock’s second, or leave. John wasn’t a runner, but this… John couldn’t take this, so he accepted Mycroft’s offer and left Sherlock before the alpha could leave him.