Lumarc

Lumarc is the slash ship between Luka Couffaine and Marc Anciel from the Miraculous Ladybug fandom.

Canon
Luka and Marc don't know each other very well, but when Scarlet Hawk Moth attacks Paris with an army of past, reakumatized villains, both boys become participates in the Parisian rebellion, so they could help Ladybug and Cat Noir take on the red colored army of supervillains while the two superheroes go to face Hawk Moth in "Mayura". Marc is briefly seen standing behind Luka, before they go into battle.

Since they both attended the boys-only party that Nino threw for Adrien in "Party Crasher", there is a chance that they might have talked or bumped into each other in passing.

Fanon
While the exact origins of the ship is a mystery, as the two don't know each very well or at all, there is a possible chance that it might have began when fans decided to ship them through their similar traits, as both boys have black painted nails, wear hoodies and have a bit of an emo-like style to them, or when the second part of the season two finally, "Mayura", briefly shows Luka and Marc standing not too far away from each other among the other Parisian rebellion participates.

Fandom
FAN FICTION

TUMBLR