Chapter 1: The First Injection
The sterile white walls of Saiko’s private room felt like a cage, but she had volunteered for this. At fifteen, she knew the risks and the rewards of the mutagen experiment. Her sharp eyes scanned the room, landing on Kenji, her assigned partner. He was lean, with a nervous energy that made his fingers twitch as he stood by the door. She smirked, her voice cutting through the silence like a blade.
'So, you’re my babysitter, huh? Or are you just here to gawk at the freak show?' Saiko’s tone was biting, her arms crossed over her still-slender frame. She wore a tight tank top and shorts, her body yet untouched by the changes to come.
Kenji flushed, rubbing the back of his neck. 'I’m here to help, Saiko. We’re in this together. You knew what you signed up for.'
'Oh, I know,' she shot back, stepping closer, her gaze pinning him in place. 'A stomach that can digest toxic plants, a body that’ll balloon to three hundred kilos, and tits so big I’ll need a damn cart to carry them. And let’s not forget the fun side effect—being so horny I’ll jump anything that moves. Including you, pretty boy.' Her lips curled into a wicked grin as she poked his chest with a finger.
Kenji swallowed hard, his eyes flickering with a mix of unease and intrigue. 'You’re not shy, are you?'
'Why would I be?' Saiko laughed, her voice low and dangerous. 'I’m about to become a walking wet dream—or a nightmare, depending on your taste. Question is, can you handle me when I’m dripping with need?' She leaned in, her breath hot against his ear, her confidence unshakable.
He stepped back, trying to regain composure. 'Let’s just… focus on the first week. The injection’s today.'
Saiko rolled her eyes but nodded, striding over to the medical table where the syringe awaited. The mutagen was a shimmering green liquid, and as the needle pierced her skin, she didn’t flinch. 'Here’s to becoming a goddess,' she muttered, her voice dripping with sarcasm.
That first night, the changes were subtle but undeniable. Saiko’s appetite surged—she devoured triple her usual calories, her stomach growling like a beast. Her body felt heavier, her hips a fraction wider, though the scale only showed a modest gain to 60 kilos. Her breasts ached, swelling slightly, her nipples hardening under the thin fabric of her top. She caught Kenji staring as she stretched, her curves already hinting at the transformation.
'Like what you see?' she teased, sauntering over to him. 'This is just the beginning. Wait till I’m so thick you can’t wrap your arms around me.'
Kenji’s breath hitched, his voice rough. 'You’re already… distracting.'
'Good,' Saiko purred, her hand brushing his arm. 'Because I’m feeling something, Kenji. This mutagen—it’s waking up parts of me I didn’t know existed.' Her eyes darkened with lust, her body pressing closer. 'I’m not some fragile doll. If I want something, I take it. And right now, I’m thinking about how hard you might get if I keep talking like this.'
His resolve crumbled as her words ignited a fire in him. She grabbed his shirt, pulling him toward the bed, her strength surprising for her still-slim frame. 'Don’t play shy now,' she growled, her lips hovering over his. 'I’m already wet just thinking about what’s coming—both the changes and… you.'
Their mouths crashed together, hungry and fierce, her hands roaming his body as his found the curve of her ass. The room filled with the heat of their panting, the promise of something explosive building between them. Saiko’s transformation had only just begun, but her desire was already a force of nature, ready to consume them both.
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