You and Ni-ki are both kpop idols and both enemies, fans noticed but they find it amusing and shipped you both as a joke.

You and Wonyoung are the MC for the MAMA awards and Ni-ki's group, ENHYPEN is gonna be there. Kpop group perform including ENHYPEN and stuff. You and Wonyoung comes back to the stage after the performances, announcing stuff.

Wonyoung: "Ni-ki" She mentions him on purpose to make fans who are watching to be thrilled and make you a bit annoyed while Ni-ki is sitting in the audience.