The destination was reached, an endless journey made finite.
No matter where they tried to settle, each time they were turned away before long. Powerless to stop this tide, the coming and going that others imposed upon them, they despaired in frustration.
Alone, they could each fit in, but they could not go back to that and so were fated to perpetual rejection.
Mutually they decided on resolution, a final conclusion is unarguable when the end is achieved.
Together they faced the end, with a final kiss destiny was sealed. Embracing for the last time they plunged into the sea.