GwenMJ

GwenMJ is the femslash ship between Gwen Stacy and Mary Jane Watson from the Marvel fandom.

Canon
Gwen and MJ are friends who are the love interests of Peter Parker, aka Spider-Man. There have also been a few known universes where the two teenage woman are spider-themed heroines themselves.

Fanon
Because of Spider-Gwen in Into the Spider-Verse, a lot of fanart depicts the two kissing, with Gwen upside-down, in the style of the famous scene from Sam Raimi's Spider Man.