As the clock signaled the end of her teaching session, Itsuki deftly tidied the materials on her desk.
"Alright, kids. That's it for today's lesson."
She scanned the entire class, followed by a soft smile that made a few male students blush.
"Don't forget to review the chapter on derivative applications of trigonometric functions we covered today. Next week's short quiz will include this material, so make sure you really understand it."
Small protests immediately arose from several corners of the room.
Itsuki just chuckled, raising her hand. "Relax, the questions won't be as hard as you think. As long as you study, you'll be fine. See you tomorrow!"
She then gathered her things and strode out of the room with firm steps, leaving behind a faint perfume scent that quickly faded, replaced by a tense atmosphere.
The students began stretching, momentarily relieved from the lesson that had just ended. But that relief was short-lived.
Moments later, the classroom door opened again. This time, it was Hiratsuka Shizuka, the Japanese language teacher. With her signature lab coat and sharp gaze, her presence instantly silenced the class.
Hiratsuka's arrival always brought a suffocating pressure on the students. After all, she was the type of teacher who didn't hesitate to use physical force—a harsh discipline infamous in the school. Some male students had even personally experienced her legendary Iron Fist.
"Sit properly! Alright, let's begin. Today we'll cover N2-level kanji."
Amid the gripping silence, Ren casually raised his hand.
"Hiratsuka-sensei, permission to go to the bathroom."
Hiratsuka glanced at him briefly and nodded curtly.
"Don't take too long. We'll be discussing Nara-period poetry, and I won't repeat the explanation just for one person."
She then turned and began writing on the board with her characteristic energy.
"Yes, Sensei. Thank you."
Ren then walked out.
(Huh… Judging by appearance alone, Hiratsuka-sensei is indeed a beautiful woman—her features are firm and captivating. Too bad her personality is nothing like a woman's. Smoking, heavy drinking, crude speech, tomboyish… She's more like a middle-aged uncle with alcohol issues.)
Walking through the empty corridor, Ren passed other classrooms where students were focused on their teachers. He wasn't lying—he really needed the bathroom. But his purpose was different from most.
Entering the empty boys' restroom, he opened one of the stalls.
Inside, Itsuki, his beloved homeroom teacher, was already waiting.
"Asking to meet here… Hubby must want to do naughty things to me, right?"
Alone together, Itsuki seemed to shed all her dignity and formality as a teacher. She revealed her feminine side—a girl hopelessly in love with the student before her, the student who had even gotten her pregnant and made her give birth not long ago.
"Yup, Itsuki-sensei guessed my thoughts perfectly." Ren replied with a mischievous grin. He stepped in, closed the stall door, and locked it. "As expected from my first woman."
Next, Ren reached out and tightly embraced Itsuki's waist. Earlier, he had indeed sent her a short message, telling her to wait in the boys' restroom.
"D-Don't do this… It's still school hours, what if someone comes…"
Though Itsuki struggled, it was only symbolic. She didn't really want to break free from the embrace.
"Itsuki-sensei, I missed you~"
Ren buried his face in the crook of Itsuki's neck.
Itsuki tilted her head slightly to give him access, but she couldn't hide the jealous tone in her voice.
"That's a lie. Except for the day I gave birth, you never came to visit me. From what I heard from Ai-san, Hubby spent most of your time having fun with women outside. Be honest—how many new sisters have been added?"
Her hand pinched Ren's waist, but the pinch didn't produce the desired pain. How could an ordinary woman's pinch hurt a Campione?
"Not many, just two. I'm sure both will fit right into the family. By the way, one of them is a Totsuki Culinary Academy alum. Itsuki-sensei, starting today, you'll eat delicious food every day. See? I care about you!"
"Really? Hubby isn't lying, is he?"
Hearing about a Totsuki Culinary Academy alum, Itsuki couldn't help but swallow. She had once tasted a dish from one of their alumni, leaving a deep impression.
"Don't believe me? You'll see for yourself this afternoon. Oh, she's a regular alum, but second seat on the Council of Ten Elites."
"Wow! That's amazing! How did Hubby meet someone that incredible!"
Itsuki's eyes sparkled, her jealousy completely gone. Instead, she couldn't wait to welcome the new sister into their little family.
Foodies are indeed easy to please, and Itsuki was no exception.
"Come on, compared to the Council of Ten Elites, that's nothing next to a Campione's status. So, Itsuki-sensei, I want my reward. Hmmm… Let's see, how about I ask for a second child?"
"Don't be ridiculous, Hubby! I just gave birth, and you want me pregnant again? I'm not a sow. Besides, Maria-san and Alisa-san are also pregnant with your kids. In total, you'll have three children—isn't that enough?"
Itsuki rolled her eyes, speechless at Ren's words.
"Not enough! Japan is currently facing a population crisis! Birth rates are dropping every year. As a patriotic citizen, I want to contribute to the nation's progress. Instead of increasing immigrant workers, I'll have you, Masha, Ai, Alya, and Ririka bear my children!"
Ren proudly declared his aspirations!
"Look at Musa Hasahya Kasera in Uganda, who has 102 children from 12 wives. I want to be like him! No, I want to surpass him!"
"More than a hundred children?!!!"
Itsuki's eyes widened. She immediately did mental calculations in her head.
"That means we'd each have to give birth to eight or nine children… No, that's wrong. There are five of us, so roughly each person would have 20–21 children… That's an unrealistic number! Even if we gave birth every year—"
"Okay, stop calculating, Itsuki-sensei."
Ren interrupted, holding back laughter at Itsuki's serious expression while calculating. He gently patted her back.
Grinning, he leaned close to Itsuki's ear.
"That's just a long-term dream. For now… how about we focus on making that second child?"
Itsuki looked up, seeing the familiar mischievous smile on her husband's face. Her cheeks flushed again, contrasting with her teacher's uniform. She lightly punched Ren's chest.
"You… Hubby has no shame."
"Don't want to?"
Ren held her waist tightly, his gaze full of passion.
Itsuki turned away, neither refusing nor agreeing, but her body pressed closer to Ren.
"Whatever. Do as you please!"
Hearing that implicit permission, Ren's eyes gleamed. He didn't waste the opportunity.
Without breaking the embrace, Ren quickly reached for the back of Itsuki's uniform skirt.
"You know? I've always wondered why women's skirt zippers are in the back and men's pants zippers are in the front. It's so we can do this without fully undressing."
With quick, skilled movements, Ren lowered Itsuki's skirt zipper, then easily adjusted their positions in the cramped space.
In an instant, they were connected without fully removing their clothes.
"Ah—!"
Itsuki nearly screamed as Ren aggressively began. She quickly covered her mouth with both hands, her eyes wide from shock and the pleasure that came too fast. Moans and the rustling of fabric filled the narrow stall.
"Slower, Hubby…" Itsuki whispered breathlessly, trying to support her weakening body. "We—ah!—are at school…"
But Ren only grew more aggressive. He tightly hugged Itsuki's waist from behind, deepening each thrust. Itsuki bit her lip, desperately holding back every moan that wanted to escape.
Suddenly, the restroom door opened from outside their stall.
*KLEK!*
Itsuki panicked instantly. Her heart pounded wildly, as if it would leap out of her chest. It must be one of the male students using the bathroom.
"S-stop! Hubby, stop! S-someone's here!" Itsuki gasped, her voice barely audible, filled with fear. She pushed Ren's shoulder, pleading for her husband to stop.
The sound of a faucet turning was heard, followed by the trickle of water, then footsteps approaching the row of stalls. Clearly, the student was urinating at the nearest urinal.
Itsuki's fear only fueled Ren's aggressive side. The thrill of almost being caught sent his adrenaline soaring.
"Too late, Itsuki-sensei. You already gave permission." Ren whispered in a low, dominant voice.
Instead of stopping, Ren grew even more aggressive. He quickened his movements, creating sensations that made Itsuki writhe wildly in his arms.
"Ahh—!"
Itsuki covered her mouth harder, her eyes wide with fear. Ren, aroused by the dangerous situation, smiled and sped up again.
"Ah—! Nnnggghh—!"
Itsuki nearly screamed before managing to hold back by biting her own hand. Tears welled in her eyes from the mix of fear and pleasure.
Outside the stall, the student snorted softly and sighed. Itsuki prayed silently that the student would leave soon.
As soon as the footsteps faded, Itsuki turned and glared at Ren angrily.
"Crazy! He almost heard us!"
"But you enjoyed it too, didn't you?"
Ren just chuckled briefly. He kept moving, making Itsuki gasp again.
Not long after, with a long moan, Ren finally reached his peak. Itsuki, already on the edge, nearly collapsed if not held tightly by Ren.
They stood panting for a moment in the cramped stall, the air mixed with Itsuki's perfume and their sweat.
"Quick, fix your clothes. I'll go out first to make sure no one's there."
"Mm."
Itsuki could only nod weakly, her body still trembling. As Ren opened the stall door and left, she leaned against the wall, trying to compose herself before returning to her role as a strict, professional teacher.