The Anime Lad
Takeshi Nanase considers himself an ordinary high-school student, though his fake relationship with childhood friend Kurumi already complicates that description. He finds Mui Aiba collapsed on campus in an unfamiliar uniform. Her explanation introduces a concealed world where magicians live apart from ordinary humans. Takeshi’s existing school problems have acquired a much larger jurisdiction.
Super Eyepatch Fox
Takeshi’s uneasy school life changes when he encounters Mui, an injured girl wearing a uniform he does not recognize. She belongs to a magical society hidden beside the human world. The meeting pulls Takeshi toward a conflict governed by unfamiliar powers and institutions while his existing relationships remain close enough to complicate every decision.
Gigguku
Takeshi begins with an awkward version of normal life, including a pretend relationship with his childhood friend. Then Mui appears on his school campus and reveals that the world has an entire concealed magical side. The contrast hits immediately. Familiar classrooms now sit beside a reality with its own conflicts, and Takeshi has no time to pretend his life is ordinary anymore!
Father's Basement
A second magical society hidden beside modern life is standard genre equipment. The opening still provides a useful collision. Takeshi’s normal world is already strained by his fake relationship with Kurumi, then Mui’s arrival introduces a much larger conflict. The premise works best when those two kinds of instability occupy the same life.