Classroom of the Elite: Why and How Airi Sakura Was Expelled

The Shock of Sakura's Expulsion

In the hyper-competitive ecosystem of the Advanced Nurturing High School (ANHS), nobody is truly safe. Not even the protagonist’s closest friends.

Airi Sakura’s expulsion in Classroom of the Elite (which takes place in Year 2, Volume 5 of the light novels) remains one of the most shocking, heartbreaking, and fiercely debated moments in the entire franchise.

Unlike other students who were expelled for cheating, violence, or failing grades, Sakura didn't break a single rule. Instead, she was the victim of cold, mathematical optimization during a psychological pressure cooker. For many fans, this was the exact moment Kiyotaka Ayanokoji proved that his "friends" were just as expendable as his enemies.

The Trap of the Unanimous Special Exam

To understand Sakura's downfall, you have to understand the sadistic nature of the exam that trapped her. In Year 2, Volume 5, the school subjected the students to the Unanimous Special Exam.

The premise was deceptively simple: the class was presented with a series of multiple-choice prompts. To pass a prompt and move to the next, all 39 students in the class had to vote completely anonymously and unanimously on a single answer. If they failed to complete all prompts within the time limit, the entire class would suffer a catastrophic penalty of losing 300 Class Points, effectively destroying their chances of ever reaching Class A.

The exam went relatively smoothly until the final, devastating prompt appeared on their screens:

"Gain 100 Class Points in exchange for expelling one classmate."

The only options were "In Favor" or "Against."

Initially, the class overwhelmingly voted "Against" to protect each other. However, a single anonymous student repeatedly voted "In Favor," intentionally preventing unanimity and stalling the exam as the clock ticked down.

Kushida's Sabotage and Horikita's Choice

Ayanokoji deduced that the stubborn holdout was Kikyo Kushida. Kushida had struck a secret deal with a rival class to sabotage her own classmates and force an expulsion, hoping to finally rid herself of Ayanokoji or Suzune Horikita—the only two people who knew about her dark, two-faced true personality.

In a masterclass of psychological warfare, Ayanokoji publicly cornered Kushida during the exam. He shattered her "sweet girl" facade in front of everyone, exposing her as a traitor.

With her secret out, the class realized they had no choice. Time was running out. They had to vote "In Favor" of the prompt to avoid the 300-point penalty. But this meant they now had to unanimously agree on who to sacrifice. The obvious, widely accepted choice was to expel Kushida, the traitor who had just tried to sabotage them all.

However, Suzune Horikita, acting as the class leader, made a highly controversial executive decision: she refused to let Kushida be expelled .

Horikita argued that despite Kushida's toxic and venomous personality, her high academic ability, massive social network, and physical skills made her an undeniable asset to the class's overall strength. Horikita prioritized long-term utility over immediate justice. Because Horikita outright refused to vote for Kushida's expulsion, the class was deadlocked. If they didn't expel the traitor, someone else had to take the fall.

Ayanokoji's Cold Calculus: The OAA System

With Horikita refusing to pull the trigger on Kushida, the class began to panic. The timer was in its final minutes. If they didn't pick someone, everyone would suffer.

Sensing the impending collapse of the class, Kiyotaka Ayanokoji stepped up and took complete control. He removed emotion, fairness, and friendship from the equation entirely. To find a justifiable target, he relied on the school's Overall Ability (OAA) app, a digital system that mathematically grades every student based on their performance.

Ayanokoji presented a ruthless, undeniable logic: if the class was operating strictly to reach Class A, they had to cut their objectively weakest link. He pulled up the OAA rankings and revealed the harsh truth to the room.

The student with the lowest overall score in the entire class was Airi Sakura.

When fans analyze this scene, they point out that Ayanokoji's argument was mathematically unassailable. Sakura's stats were a liability across the board:

OAA Category	Sakura's Performance Level
Academics	Consistently scored near the very bottom on written exams, frequently requiring tutoring just to avoid baseline expulsion.
Physical Ability	Zero athletic prowess; an active detriment during sports festivals and physical Special Exams.
Adaptability/Social	Severe social anxiety. She actively hindered communication in group tasks and had zero influence outside of her small friend circle.

When Haruka Hasebe (Sakura's best friend) desperately tried to protect her by threatening to vote against Sakura's expulsion, Ayanokoji relentlessly pressured Haruka. He systematically dismantled her emotional defense, making it explicitly clear that protecting Sakura meant dragging 38 other students down with her.

The Heartbreaking Acceptance: Sakura's Final Act

The most tragic aspect of Sakura's expulsion is that she didn't fight back. She didn't scream or curse Ayanokoji. Deep down, she knew he was entirely right. She was the anchor holding the class back.

Her lingering, unrequited romantic feelings for Ayanokoji made the betrayal sting even worse, but it also compelled her to accept his judgment. Seeing Haruka utterly broken and willing to doom the whole class just to save her, Sakura stepped up.

In her final act of bravery, Sakura personally begged Haruka to vote for her expulsion so the class could survive.

Haruka, weeping and defeated, finally complied. The vote became unanimous. Sakura was formally expelled, and the Ayanokoji Group—the one place where Ayanokoji seemingly experienced normal high school friendship—was permanently destroyed.