Minato panted, looking at the equally sweaty and naked body of his beloved wife, running the back of his hand across her cheek, loving the feeling, just as he loved the wild raucous sex they just had. "You're just as beautiful as the day I met you, that one night, you got kidnapped." He chuckled.
Kushina smiled, running her hand across her husband's lithely muscled chest. "Always as charming the day I met you." She said, running her hand down lower and giving his member a gentle squeezing. Although she paused across his abdomen, softly rubbing against the seal formula left on him. How ironic, that night, she was suddenly lifted of her burden... only for her son and husband to be afflicted by it.
Minato was about to respond, before they heard a small knock at the door. "Mom? Dad?" Both of them got up swiftly as Kushina rushed to grab some garments while Minato put on a pair of navy blue boxers. "What is it Naruto?" Minato said, making sure he wasn't in any state of arousal.
Both of them paused, remembering that night the masked man had attacked them. Kushina put her hand on her chest, the night her burden had been ripped away, and her son and husband cursed with it. Minato nearly used the Reaper Death Seal if not for the insistence of his wife, using only the Eight Trigrams Seal instead in conjunction with her. She always worried if she made the right choice. She'd spent countless nights worrying about it, if there would be any side effects. If Kyuubi was too powerful for both of them to handle, if the seals were strong enough, especially since Naruto got the lion's share of the burden. But so far her worries had proven unfounded as Minato moved to open the door.
"I feel a little weird..." Naruto muttered from the other side, as Minato opened the door, but both of them froze when they saw why. Naruto was rubbing his eyes, trying to get the sleep out of his eyes, but his ears were gone, replaced with pair of squeezable fox ears on the top, while his arms and legs resembled somewhat more of a fox's than a humans. Two fox tails swished in the air behind him, while Minato also realized... Naruto had a bit more *ahem* downstairs than he remembered... More than what he had currently... But he didn't have time to think about that.
Both of them rushed forward, worried for Naruto. "Are you alright Naruto? Is everything okay?" Kushina asked, somewhat insistent, worried for her son's well-being. She'd never heard of this happening in any other seal records. She lifted up his shirt, taking a look at the seal, but it seemed to be intact. But wait... that one formula in the corner... it looked off...
Minato was rubbing Naruto's shoulder gently, worried as well for his son, although he felt like his hand was slowly getting warmer, but he dismissed it for now. His eyes ran across the seal as well, unaware of the one on his own stomach showing as well. When he noted the same area, "What's that?" He said, reaching towards it.
"Wait, don't!" Kushina yelled, but it was too late as he touched it, red chakra bolts shooting out from it, striking them both in the chests. Both of them collapsed while Naruto looked confused, blinking somewhat tiredly, feeling drained from the sudden burst. Kushina felt a sudden heat take her, not like the chakra, but like a burning need... one that needed filling... NOW! But she was not about to do it in front of her son. "Dear!" She shouted, Minato's eyes telling her he was experiencing the same thing as he reached out, and grabbed her hand, vanished in a yellow light.
Naruto looked confused, wondering where his parents went, and why he was all suddenly so hairy... besides the fact his pants seemed tight... Maybe Sasuke would know what to do! He smiled cheerfully, his bountiful energy seeming to come back, as he bounded off to find his friend.
====Unspecified Forest====
Minato and Kushina flashed into the forest, Kushina falling onto the ground while Minato braced himself against a tree, both of their chests burning with pain where the tendrils impacted them, both of them dressed in the barest means possible.
Minato grunted, grasping his chest where the searing was worst, while Kushina groaned on the ground, clutching the same area, "Wh-what did he go..." She grunted, worried about the searing pain. She knew what the chakra was capable of, but this was something new.
"I honestly don't know..." Minato responded, somewhat worried as well. his attention was interrupted as he realized he couldn't stop his hand from shaking. Lifting it up, he looked at the area, seeing a kind of fox tattoo almost on it, but he didn't have time to reflect as his eyes widened in shock as he realized that it was covered in some kind of black coating. Taking a closer look, he realized, it wasn't a coating, it was... fur? It got darker and darker as he realized that black clawed nails had burst through his own.
Kushina was gasping as she saw her own hands going through the same change, humans hands changing almost to that of a fox's... She didn't have time to think about it as a sudden burst took over her chest, "AH!" She moaned, furred, clawed hands clutching at her bosom as she felt them expand, mounds of breast filling them suddenly as her breast clamp shot out, her chest easily double in size in a matter of seconds, her thoughts barely interrupted as a crack followed as her spine elongated, the flesh following along, coated in the exact same fur pattern.
Minato grunted as a pain seized his foot, lifting it up, he grunted as he felt two of his toes merging together, the pain making him tense up as his other foot followed suit, both quickly coated in the same fur as his nails elongated. A tickling sensation followed as he felt the same fur moving up his hands and arms, the dark fur stopping midway up his shins and forearms, and making way to a more orangish color, as his own tail burst from behind.
Kushina was still too preoccupied with her own situation, her breasts now easily the size of her head and still growing. Clutching both as much as she could, she felt her ears as though they were shifting and elongating, one hand reaching up to feel as they seemed to grow into more bestial furry forms, like that of a fox too... Her thoughts were interrupted again as another surge caught her attention, her remaining hand teasing her perky nipples, a sudden spurt caught her attention, as she reached up and tasted it... it was... 'Milk?' she idly thought, once more distracted as the heat now moved to her womanhood, feeling it saturated as she felt as though she were going into heat, and then she looked towards Minato...
Minato seemed to be going through the same feeling, his clawed hands digging into the tree as his hips thrust forward, his member pitching an impressive tent in his only article of clothing, his boxers. He moaned as he felt a pulse in his balls, a throbbing that grew and grew, and grew! To Kushina's eyes, she watched as the throbbing became visible to her eyes, two visible mounds straining to break free, and they did, as two gurgling spheres ripped through the bottom of his boxers, coated in a lush, white coat, each eager to break free.
She couldn't resist, and her hand reached down to tease her folds, incredibly aroused at the sheer sight of what her husband was going through, careful with her new claws. Feeling as though it became more... as though she could shove as much as she wanted in, and still have room for more...
Minato dug his claws deeper, as it wasn't done. He watched as his cock began to elongate, a furious red from the amount of blood going through it, and each inch drove him insane, feeling as though he were cumming without cumming. He clutched it close to him, feeling as it slid across his chest, teased by his abs, then his chest, then his neck... over three feet of cock and still growing. It wasn't enough as he felt it thicken too, feeling it go from the width of his wrist to beyond, arm barely able to wrap around it, as it nearly grew as thick as his torso, head practically larger than his own head as he rubbed and licked as much as he could, his newly sharpened canines teasing it.
Kushina moaned as she continued teasing her breasts and folds, watching as her newly endowed husband pleasured himself, tattered boxers hanging on, she felt herself spurt at the same time Minato reached his limit. And Kushina watched as her husband came, watching the flood of cum travel and expand his cock, bursting out and raining on him. Both of their lust-filled eyes locked, eager to continue.