Kuroi-sensei's Special Detention

The classroom was quiet after school, with only Nanako Kuroi and her favorite student, Hiroshi, remaining. Nanako leaned against her desk, her eyes sparkling with mischief as she watched Hiroshi nervously pack his bag.

"Hiroshi-kun, staying late again?" Nanako asked, her voice smooth as silk.

"Yes, Kuroi-sensei. Just finishing some homework," he replied, avoiding eye contact.

Nanako sauntered over to him, placing a hand on his shoulder. "You know, you're my favorite student," she whispered, her breath warm against his ear. "You're always so diligent... and so handsome."

Hiroshi blushed, dropping a pencil. "Kuroi-sensei, I..."

"Shh," she interrupted, her fingers tracing the line of his jaw. "I've been watching you, Hiroshi-kun. And I have something special to teach you today... something you won't find in any textbook."

She locked the classroom door and pulled down the blinds. "Today's lesson... is biology. The most practical kind."

Nanako guided Hiroshi to her desk, perching herself on the edge. "Have you ever been with a woman, Hiroshi-kun?"

He shook his head, eyes wide.

"Perfect," she grinned, unbuttoning her blouse slowly. "I love being the first. There's something so exciting about taking a boy's... innocence."

She pulled him closer, her hands roaming under his shirt. "You're going to make me so happy today, Hiroshi-kun. And I'm going to make you a man."

Their clothes quickly found the floor, and Nanako lay back on her desk, her body displayed for him. "Don't be shy now. Touch me."

Hiroshi's hands trembled as they explored her body, following her guidance. "That's it... right there... oh, you're a natural!"

When he finally entered her, Nanako gasped dramatically. "Oh! Hiroshi-kun! You're so... enthusiastic!" She wrapped her legs around him, pulling him deeper. "Deeper, honey. Don't hold back."

As he moved inside her, Nanako moaned theatrically. "Yes! Yes! That's the spot! Oh, you're going to make me—" Her eyes widened as she felt him tensing. "Are you close? Are you going to...?"

"I... I think so, sensei," he panted.

Nanako's voice dropped to a conspiratorial whisper. "Then go deeper, Hiroshi-kun! Make it a big load! Give me everything you've got! I want to be the first to take your... fertile load!"

She bucked her hips wildly as Hiroshi cried out, his body shuddering with his first real orgasm. When he collapsed onto her, Nanako stroked his hair, a triumphant smile on her face.

"Congratulations, Hiroshi-kun," she murmured. "You've passed today's lesson with flying colors. And don't worry... your favorite sensei will always be here for extra credit."