This Chuunibyou Isn't Acting

In the eyes of her teachers and classmates, Li Yuan has always been a well-behaved, serious girl, the very definition of "someone else's child." Then one day, a new transfer student in her class happens to find a notebook left on the sports field. The neat handwriting on its title page seems familiar, just like the model essay for the year level he read that morning. Written carefully, stroke by stroke, are the words: I am a great mage from another world, charged with eradicating the supernatural from this realm. Having lost my powers through reincarnation, I have fallen under the control of the demon god of destruction known as [SCHOOL]... To break free from this seal of endless daylight, I must overcome the trials of the white demon [TEST] and rekindle my extinguished star of fate... In the name of magic, I shall form an unparalleled pact with the [Sequences] above [TEST]! The transfer student: "...?" * When she was a student, Li Yuan carefully kept a secret. Like everyone who goes through a chuunibyou phase, she was convinced that she was a great mage whose powers had been sealed, a mysterious being no one in this world could understand. Except... her future deskmate. The new transfer student in her class, a boy who claimed to possess the "spirit of the immortals who reversed yin and yang." The boy's chuunibyou antics were so flamboyant that he soon became the class weirdo. His arrival also let Li Yuan experience for the first time what it meant to meet a kindred spirit and wish they'd met sooner. * Many years later, Li Yuan accidentally encounters something strange in this world. In a dim corridor, the lights flicker. Li Yuan, long past her chuunibyou phase, stares blankly at the supernatural creature shrieking as it lunges at her from the distance. Thinking she's afraid, the creature grins hideously, baring a mouthful of sharp teeth. Li Yuan: ...Wait. So the supernatural really exists?! "Urgent as the law commands! Spirit of the immortals who reverse yin and yang, appear!" A booming shout suddenly comes from behind her. A golden light shoots out. The creature screams and vanishes in an instant. Li Yuan turns to see who it is. It's her former deskmate, the transfer student she hasn't seen in years. Li Yuan: ... ...Huh? That spirit you swore was real back then... you weren't making it up either?! A heroine with supernatural powers who doesn't know she has them x a male lead who really seems like an immortal master 1. Inspired by Love, Chunibyo & Other Delusions #Because the Dark Flame Master will always be with the Wicked Eye 2. Blurb written on July 3, 2023 3. The heroine's notebook in plain language: Study hard and make progress every day. Theme: The days of youth never fade