"Well, Doc," Raph says, spreading his legs as he perches on the side of the bed. "Give it to me as straight as ya can. Which I guess ain't very straight at all." 
"Very funny," Leo mutters, sinking to his knees and eyeing Raph's cock with an apprehensive look. 
"Jeez, relax. You're actin' like you haven't had my little Raph in ya a million different ways." Raph pauses and cocks his head, feeling a little concerned. "I mean, you don't have to--" 
"No, I do," Leo assures him. "It was my idea, remember?" He flexes his fingers. "I just...it's a big thing, sharing this with you." 
"I understand," Raph says, placing steady hands on Leo's shoulders. "I'm ready, okay?" 
Leo nods, straightening his back a little. "Well, then." He reaches out, wrapping his fingers lightly around his brother's dick. Raph lets out a little sigh, rolling his hips into the touch; no matter how many times his brother does this to him, it never gets old. 
"Rin," Leo whispers, soft, almost reverent. Blue light shimmers gently along his nails, dancing against Raph's skin. He sucks in a breath--he's experienced this sort of thing before, but never in such a sensitive area. The power hums sweetly as it pulses over Leo's fingers, brushing along his skin. 
"Feel it?" Leo asks. 
"Yeah, fuck...." Raph reaches down and wraps his fingers around Leo's wrists, yanking him closer. "Gimme some more, baby." 
"Pyo." Leo obliges, sliding his fingers up and down Raph's shaft, carefully stretching his hand to thumb at the head. Raph lets out a sharp hiss at that, his cock swelling as the light grows brighter. 
"Tou." His brother always looks so fucking beautiful like this, eyes narrowed in concentration, blue light reflecting from their eyes like they're glowing. He bends down and brushes his mouth against Raph's cock, sending the light shimmering like disturbing water. 
"Fuck." Raph fights back the urge to grab Leo by the chin and shove his cock down that perfect throat. If he did that, he wouldn't be able to savor the tender flesh of his cock is practically vibrating right now, heat building by the second. 
"Shah." There's a sudden bright flicker of light and Raph jolts, a deep churr slipping out of his mouth. The light is flowing all over his cock now, humming against his flesh in more places than he can count. 
"Rin. Pyo. Tou. Shah." Leo's pace is picking up, his fingers fading into blur under the bright blue glow. "Rin. Pyo. Touh. Shah. Rin. Pyo. Touh. Shah." 
There's nothing wrong with Raph right now, but he still can feel the light flowing through him, warming and steadying him, healing things he didn't know needed to be healed. He thrusts his hips more desperately, fucking into Leo's fist. He's seen his brother do such wonderful, terrible things with these hands of his, but this might be his favorite. 
"Rin. Pyo. Tou. Shah," Leo repeats, again and again, the blue sprouting from his veins like flowers. "Rin-pyo-tou-shah. Rin-pyo-tou-shah." It's going bright now that it hurts to look at, a bubble of energy almost singing against Raph's cock. "Rin pyo-tou-" 
"Fuck!" Raph snarls, lunging forward to dig his fingers into Leo's shoulders. It's not the hardest he's ever come, but it's pretty damn close. White spurts free to mix with the blue, hissing as it spills across Leo's glowing hands. 
Leo takes a deep, slow breath, visibly pulling the slight back into himself. Raph sags a little at that, his grip on his brother's skin relaxing. He swears he can feel the last buzzing buried deep down in his flesh, slowly dying away. 
"You good?" Leo asks. 
"I'm good," Raph says, letting out a deep sigh. "I'm real good. You?" 
Leo blushes. "I...yeah." Raph glances down and notices a significant lump between his brother's legs. He smirks and bends down, scooping Leo into his lap. 
"Yeah!" Leo yelps, trying without much effort to get free. "I've got your crap on my hands, I need to--" 
"You've got a tongue, dontcha?" Raph growls. Leo huffs, before bending down to carefully, obediently lap the cum off his palms. Raph grins before he can stop himself at the sight. 
Leo glances up at him, frowning. "What?" 
"Nothing. Just..." Raph smooths a hand down Leo's wrist, chasing the last of the blue glow--his brother's glow. "I love ya so much, you know." 
"Of course I do," Leo mutters, like he can't believe Raph didn't know that already. 
"Rude," Raph mutters, tightening his grip just a little. "Give me a few minutes and I can take ya for a real spin, whip you back into shape." Leo stiffens at that and Raph smiles again, even bigger than before.