As the weeks passed, the lessons became the highlight of Haruto’s life. They huddled over notebooks in the quiet library, whispering about "The Case of the Missing Variable" and the motives of Shiori’s fictional detectives. The air between them grew charged—not just with the thrill of a secret, but with the quiet realization that they were the only two people who truly saw the other's hidden world.
“That’s my real lesson,” she continued, her voice barely a whisper. “The secret one. I don’t teach algebra. I teach people how to survive being invisible.” katekyo kireina onesan to himitsu no lessons full