Merlance

Merlance is the het ship between Tommy Merlyn and Laurel Lance on CW series Arrow.

Canon
Following Oliver and Sara's presumed deaths aboard the Queen's Gambit, Tommy and Laurel soon found each other connecting and had a fling for a few years. While Laurel never let herself see it as anything serious, as Tommy was a notorious womanizer, Tommy told Laurel later on that he couldn't stop thinking about those nights and that it wasn't "just fun" for him. It was something more and he wanted to prove that he was serious about the two of them. Oliver's return from the dead understandably stirred a lot of unresolved issues with Laurel, which were the biggest hindrance for Tommy and Laurel truly moving forward with their lives together.