Classroom Of The Elite Vol. 1 by Syougo Kinugasa

At a prestigious Tokyo high school where students earn status and privileges through points and ruthless evaluations, apathetic transfer student Kiyotaka Ayanokoji is placed in low-ranked Class D and hides a disturbingly capable intellect; drawn into the ambitions of the cold, determined Suzune Horikita and the affable but secretive Kikyo Kushida, he quietly manipulates classroom politics and brutal exams, revealing the moral compromises, social games, and psychological strategies students use to survive and climb a system that rewards competition above all else.

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