A Falling Star (SHKLANCE)

Shiro, Keith, Pidge, Hunk, Allura, and Coran are all getting along well in the castle of lions, fighting against the Galra forces and freeing captured planets. They're all fighting so hard, quickly bonding with one another, fighting and gaining the strength to save the galaxy from the same fate the Alteans experienced. They're all becoming a family, though rough and bumpy in the beginning, they're blending together as the war acts like sandpaper, smoothing the edges. All the edges except for tiny rough patch called 'Lance'.

Or the one where everyone in the castleship are bonding and becoming a team and family, except Lance just can't seem to get over his insecurities to join them. While he may not think so, they want him included just as badly as he wants to be included.