Lesson Learned

Just don't panic

Mitsuko swallowed, glancing at her teachers' apprehensively.

Bitch-sensei scoffed. "You mean besides punching me in the face?"

Mitsuko cringed while her father raised an eyebrow. "It wasn't like that!" she said quickly. "I was defending myself!!"

"You nearly cost me a nose job!" Bitch-sensei snapped.

Mitsuko glared at her. "Oh, get over—"

"Manners, Mitsuko," the Principal interjected evenly, smiling thinly.

She clammed up when she saw his gaze rest on her expectantly. "I..." She cringed and bowed, closing her eyes tight. "You're right, Bit—Ms Jelavic...I'm sorry I punched you. It was uncalled for and disrespectful. Please accept my sincerest apologies."

There was an uncomfortable silence.

"...It's okay, kid," Bitch-sensei replied slowly, sounding uneasy.

Mitsuko straightened up, keeping her gaze low when he cheeks burned red from embarrassment

There was another long stretch of silence while the Principal examined the cube.

"Didn't you used to have a toy like this, Mitsuko?" he asked lightly.

"...Yes," she replied, watching him warily.

The Principal started rotating the sides. "There's a lesson I used to teach my children when they were young," he told the two other teachers. "Would you like to hear it while we wait?"

"Be our guest," Mr Karasuma replied curtly, looking like he'd rather be somewhere else.

The Principal twisted the cube around to align the colours. "I want to line up the colours on this cube—all of them, and quickly."

Mitsuko felt like groaning when she recognised the lesson, it had been one he'd taught them when they were nine; one of their lessons in winning. She'd assumed at the time the lesson had just been an excuse for her father to break one of her toys since she'd gotten a 75 in a test.

"With a method, anyone could use..." He continued. "How would you go about it?" The Principal asked, picking up a screwdriver from the stationary pot. "Teachers?"

Bitch-sensei raised an eyebrow while Karasuma remained silent.

Mitsuko sighed softly, leaning against the wall. 

The lesson is to win at any cost, she could remember her and Gakushuu answering whenever prompted. 

"The answer is simple." The Principal used the screwdriver to break the Rubix cube, just as Koro-sensei walked in. "Take them apart and put them back together. Very Logical."

Mitsuko narrowed her eyes at the pieces when they scattered onto the floor.

"Hm?" Koro-sensei paused in the doorway.

"We meet at last, Koro-sensei!" The Principal smiled pleasantly when he saw him, standing up.

Koro-sensei closed the door behind him. "He says he's the Principal of this place..." Bitch-sensei said warily. "And Mitsuko's father."

Unfortunately

Mitsuko grimaced, watching Koro-sensei's reaction.

"As teachers, he's our boss," Mr Karasuma said.

Instantly, and to Mitsuko's horror, Koro-sensei went into full kiss-ass mode when he rushed to the Principal's side, pulling up a chair for him. "My-my you've come all this way!" He was actually giving him a massage. "Say might I receive a little bump in my salary? I've added a few more doubles you see."