Days blurred into a secret paradise. Finn stayed invisible to the world, only visible to Cairo. They explored each other endlessly. Mornings started with Cairo waking to Finn's mouth on his cock, sucking lazily until he spurted breakfast cum down that angelic throat. 'Mmm, wake-up call,' Cairo would moan, fingers in Finn's hair.
Afternoons, while Cairo worked, Finn hovered nearby, sending teasing thoughts, images of them fucking, that made Cairo hard behind the counter. Evenings were for passion. One night, Cairo bound Finn's wrists with his belt to the headboard. 'My turn to play angel.' He teased Finn's body with ice from the freezer, trailing cubes over nipples, down to his cock, then ass.
The cold made Finn shiver, pre-cum leaking. Cairo licked it up, then rimmed him thoroughly, tongue probing deep while fingering his hole. 'Taste like heaven,' Cairo murmured. He added fingers, scissoring, until Finn begged. 'Fuck me, please.'
Cairo lubed up, sliding into Finn's virgin ass which was tight, gripping like velvet. He thrust slow, building speed, hand stroking Finn's cock. 'Take it all, my guardian.' Finn's wings thrashed, pleasure overwhelming. He came hands-free, ass clenching to pull Cairo deeper. Cairo followed, grunting as he filled him.
Another time, in the shower, water cascading, Finn pressed Cairo against the tiles, lifting one leg to enter from behind. He fucked hard, water splashing with each slap. 'Your ass is mine,' Finn growled, nipping his shoulder. Cairo braced, pushing back. 'Breed me, angel.' Cum mixed with water, swirling down the drain.
But the Academy noticed Finn's absence. Warnings came as whispers in his mind, 'Return or face consequences.' Finn ignored them, focused on Cairo. They talked deep into nights about faith, doubt, the beauty of human flaws. Cairo shared his sketches, including one of Finn now, wings and all. 'You're my muse.'
Tension built when superiors sent a scout angel, a stern figure named Raoul. He appeared in the apartment, invisible to Cairo who was sleeping. 'You've broken vows, trainee. Interfering and lusting, it's forbidden.' Finn stood firm. 'Love isn't a sin.' Raoul scoffed. 'Humans corrupt. Leave him.'
A chase ensued in the ethereal plane, Finn dodging through clouds while Cairo slept unaware. Finn won, victorious over Raoul temporarily. But it shook him. 'They'll come for us,' he told Cairo upon return.
Cairo pulled him close. 'Then fight with me.' That night, their sex was fierce, reclaiming. Cairo rode Finn reverse cowboy, ass bouncing on that divine cock, hands on Finn's thighs. 'Won't let them take you.' Finn thrust up, fingers digging into hips, watching his length disappear into that perfect hole.
He flipped Cairo onto all fours, mounting like a beast, pounding relentlessly. 'You're mine forever.' Cairo howled, cum puddling on the sheets as Finn knotted deep, wings pulsing energy to lock them. Hot seed overflowed when he finally pulled out.
Peace was short. The Academy summoned Finn forcibly one dawn, yanking him to the halls. Cairo woke alone, heart breaking. 'Finn?'
In the Academy, elders judged. 'Your fascination endangers the balance.' Finn pleaded. 'Let me protect him properly. Make me his full guardian.' They deliberated, sensing the pure bond between them. 'One chance. No more lust, only duty.'
Finn laughed. 'Lust is part of love.' He fled back, wings burning with resolve.
Returning, he found Cairo distraught, packing to search for him. 'I'm here,' Finn said, solidifying. They embraced, tears mixing. 'Won't leave again.'
With Finn's status secured as Cairo's guardian, life stabilized. Finn could appear at will, blending into Cairo's world. He helped with sketches, inspiring visions that sold well, easing money woes. Cairo quit the coffee shop, pursuing art full-time.
Their bond deepened through adventures. One weekend, they hiked to a secluded cabin, away from prying eyes. There, uninhibited, they fucked outdoors with Cairo bent over a log, Finn slamming into his ass under the sun. 'Harder, make me feel it.' Birds scattered at their moans, cum dripping down Cairo's thighs.
Nights by the fire, Finn used his wings to cocoon them, cock sliding into Cairo spoon-style, slow grinds building to shuddering climaxes. 'Forever,' Finn breathed, seed warm inside.
Challenges arose later. A rival artist stole Cairo's ideas, sparking doubt. Finn whispered encouragement and comfort. In trying to distract him and prove his devotion, he tied Cairo spread-eagle, edging him for hours. Fingers, tongue, cock teasing entry but pulling back. 'Trust me,' Finn said, finally plunging in, fucking through the buildup until Cairo exploded, screaming release.
Cairo reciprocated, blindfolding Finn and using toys, a vibrating plug in his ass while sucking his cock. Finn writhed, wings spasming. 'Don't stop.' Cairo removed the blindfold to watch Finn's face as he rode the vibrations to cum, then fucked him through the aftershocks.
Public thrills too. At an art show, they slipped to a storage room. Cairo dropped to knees, blowing Finn against crates, swallowing every drop. Finn returned the favor later in the car, fingering Cairo to orgasm while driving home.
Years passed. Cairo's fame grew, but he credited his 'muse.' Finn, wiser now, balanced duty and desire. He guided Cairo through losses and family illnesses, holding him through grief.
One anniversary, Finn crafted a ring from starlight, proposing. 'Be mine, human.' Cairo teared up. 'Yes.' They sealed it wildly, fucking on the balcony, Cairo riding Finn under moonlight, asses clenching, cums mingling.
Their love, born of fascination, became legend in angelic whispers, a trainee who claimed his charge, proving heaven and earth could unite.
But passion never faded. Even in old age, Cairo graying, Finn immortal, they rutted gently with Finn entering from behind, hand on Cairo's softening cock, whispering, 'Still perfect.'