Klance

Klance is a slash ship between Keith and Lance in the Voltron: Legendary Defender series. It's not a new ship, existing in some form at least since the 1984 "Voltron: Defender of the Universe" cartoon, and maybe even before that in the form of the anime Beast King GoLion.

Regardless, the ship has only really taken off for modern audiences in the last year. This is thanks to the 2016 Netflix release of Voltron: Legendary Defender, produced by Studio Mir (Legend of Korra). A lot of the writers and directors for Voltron migrated from Korra, famed for it's bisexual ending, and have made comments concerning possible LGBT+ content.

Working with Netflix and Dreamworks rather than Nickelodeon has led Joaquim Dos Santos to say that they "can explore areas that may be considered controversial for standard cartoon series on major broadcasters, including sexuality."

These elements, among others, have fostered a genuine hope in fans that Klance might pose some meaningful and obvious LGBT+ representation.

Canon
Another time I'll explain properly how these two fit the red/blue, love/hate, push/pull tropes of many popular canon romances, and the elements of the show that suggest that Keith's 'Galra' reveal corresponds with him being gay, but for now I think these images say it all.