After the end of S1, Shiro wakes up in an alternate universe where he pledged allegiance to the Empire.

Keith tells the truth, makes a friend, and bleeds. Lotor falls hard. “Did you… Did you seduce the enemy?” Lance asks. “I didn’t know you had it in you.” Keith frowns. “I didn’t seduce him.” Silence descends and it’s one of those moments when he’s not in on the joke, because everyone is sharing looks. “I didn’t,” Keith repeats.

Post Season 1, Shiro and Pidge crash-land on a deserted planet and need to rely on each other to survive the aftermath of the battle with Zarkon. (written prior to Season 2 airing; this is an AU where Pidge and Matt are identical twins.)

Having grown up in Japan, Shiro was used to the anti-ghoul propaganda and the strict lives they had to live through. So, when he moved over to the US to join the Galaxy Garrison, he was very much surprised over the fact that ghouls had actual, proper rights that let them work for the government and go to space. However, being sent on a mission to space with two mature ghouls and supplies for them was much, much different than being in charge of four teenage ghouls while fighting a galactic empire and having to make do with the supplies that they had on hand. AKA, Shiro is the only one in the castle-ship who is completely human, and is completely done with no extra fucks to give by the end of it.

Shiro is waiting for Keith on the bridge when Matt comes to say hello. Keith finds them in a compromising looking position, which accidentally opens up a new world of possibilities. Written for Kinktober Day 4 - Spitroasing

"So it turns out that forming Voltron is a lot harder to accomplish when you’re not all about to die." Or where Lance engages in some dick centered problem solving. He and Keith struggle to form the oneness of mind they need for Voltron, so they try to work it out between themselves.

The harvest god Kogane requires an offering of seed—and not the kind that you plant. Shiro is more than willing to provide.

No one would help him get to the bottom of Kerberos, and it had all reached a breaking point when Iverson threatened to terminate Keith’s scholarship if he kept snooping. So Keith got what he came for, the little black book no one was ever meant to find, and stopped snooping. Because now, he’ll have someone else to do all the snooping for him. The situation isn’t ideal, Keith thinks as he slits his palm open and methodically draws the pentagram on the floor, placing the necessary items one by one into each point of the star. But considering the circumstances, he thinks he’s done alright for himself. More importantly, for Shiro.

They think it will be funny to leave him with a Galra in heat. It whimpers. It's a sound of pure pain, one Shiro's heard a hundred times now in the arena. The sound of something wounded and helpless; the sound of something that knows it. "Are you hurt?" Shiro asks in the bare silence of the cell, and moves a few steps closer. The creature on the floor twitches violently at his voice. It's not dressed like the other prisoners. It's hard to tell in the poor lighting but the back of its skin-tight suit is glowing in circuits, the same purple he's come to associate with the Galra. "I won't hurt you," he says, softer. It doesn't make a sound but its back arches, head lifting from the floor, dragging black hair along the floor. It's dripping wet with blood or sweat. Shiro realizes the small sound he's barely been registering is breath—it's panting. It rolls, just enough to eye Shiro through its dark bangs. He. It's a boy, and he's beautiful.

“I still - I don't-” Shiro feels like his brain is broken. “I still don't get why this is necessary.” “All aspects of physical stamina are tested during the trials,” Kolivan replies, standing next to him as both of them watch the screen. “Awakening the blade is only the first step. Your friend is an omega, and all omegas currently serving with the Blades have lasted an hour or more on this device. It is protocol.”

“Now you get to help me stall them since you almost blew my cover.” Keith shifts in his lap and Shiro’s fingers tighten on his hips. “We gotta act like we’re into public shit. They’re gonna leave otherwise.” Shiro freezes where he’d been mouthing at Keith’s bare shoulder. “I’m serious, Shiro, don’t blow this fucking mission,” Keith hisses. “We’ll deal with this later.”