My ‘Simplistic’ School Life (Rewritten)

When it comes to raising aspirational people, Saikoyo Prep is among the top educational institutions. Even though it has a outstanding reputation, the school has some strict admissions standards and a hostile intellectual climate.
Normally, only the top scorers are admitted, but this year, they chose to lower the bar and let what they consider to be "inferior" children into the school.
One of the unfortunate pupils, Yuki Amaya, applied to the institution without knowing its true nature and was admitted.
How will he get by during the three years of this experience?
Sidenote- Inspired by Classroom of the elite.