Lin Shen accidentally traveled into the world of "Spell Return" while staying up late to catch up. He rescued the tiger stick during the battle between Gojo Satoru and the super-level curse spirit, and was recognized by Gojo Satoru to enter the Curse Academy. Relying on his familiarity with the plot, he played a key role in dealing with the task of dealing with the cursed ghost in the abandoned hospital, winning recognition from his peers.
During an exchange between the two schools, the Tokyo School and the Kyoto School faced off due to the research on mysterious ancient magic books. Lin Shen temporarily eased the conflict by sharing his research results, but that night he discovered that the classics contained the secret of "the forbidden key, which requires blood." Late at night, the black-clothed curse spirit raided to snatch the classics. Lin Shen saw Wild Rose fighting with the curse spirit, and even discovered something unusual about the mechanical pill.
In the library, Zenin Maki confronts the cyborg Maru whose program has been tampered with, and Gojo Satoru is trapped. Lin Shen's blood activates the hidden power of the classics, helps Gojo Satoru escape from trouble, and reveals the truth about Zen Yuan Maki being used by his family. After the crisis was resolved, Lin Shen took hold of the tome containing the power to break the curse class and started a new adventure in the world of curse.
