TruMai

Trunks x Mai is a het ship between Trunks and Mai in the Dragon Ball series.

Canon
When Kids Trunks and Kid Mai (who had been turned back into a kid by the Dragon Balls) first meet Trunk lied about dating Mai while bragging to Goten. When Goten tried to call him out on it he convinces Mai to go along with the ruse.

He develops a crush on her later on and is jealous of her crushing on his future counterpart so he tries to impress her.

In the alternate timeline Future Trunks and Future Mai are in a relationship.

Fanon
The ship has some followers due to their time spent together in Dragonball GT.