In the popular anime series 'Fairy Tail', Lucy and Natsu are not officially a couple, but their relationship is definitely good. Over time, their relationship gradually grows. When the series ends, they can no longer do without each other.
As these characters grew and their relationship progressed, this development is wonderfully portrayed. They hold each other tight live for and take care of one another well beyond the ordinary, shall we say. Their profound connections are evident.
Although the creators haven't specifically portrayed them as a couple, fans' before widespread view of their romantic status now depends on that very chemistry.