Ranks or Hearts - Gyuricky

Seoul Academy is a prestigious institution. Whereas everyone is ranked by their class status. The only way to change your status: pass the Hierarchy test. Most, students give up after their first failure.

Shen Ricky is everything one inspires to be. Ricky has perfect grades, attractive, from a wealthy family. Making him at the top of the Hierarchy. His cold-demeanor makes him hard to approach, but his status buys him respect.

Kim Gyuvin is everything Ricky is not or wishes to be. He is cheerful, kind, and attractive. He comes from a low income family, but it comes with the blessing of a good family. He becomes the target for entitled jerks.

Their worlds collide changes everything for the better and worse.

Some references of Hierarchy from Netflix.
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Also on AO3