This is Volume 3 of the Quest for High School Mathletic Glory, and, while the opening chapter takes place concurrently with the late stages of Volume 2, the main action takes place five years after Volume 2 ends.
In addition, it doesn't follow the same main character; Volume 3's main character is a minor character in Volume 2, and a few characters from Volumes 1 and 2, as well as the Venomous Agenda Memoirs, will be mentioned.
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Trigger warnings: References to drug abuse