The summer sun at age 18 was so bright it made her eyes sting—or perhaps her eyes had been welling with tears all along.

It had been an entire month since Guest woke up in her own scrawny, high-school senior body. For the past thirty days, her life had been a long, agonizing cycle of deep yearning. The arrogant, fiercely possessive husband who used to spoil her rotten at age 26 was now sitting just a few rows away from her in the flesh. Yet, the distance between them felt as vast as parallel lines.

The 18-year-old Gojo Satoru was still the center of the universe: breathtakingly handsome, obscenely wealthy, and radiating a wild, reckless charm. He was always surrounded by a buzzing crowd, and the person holding the position that rightfully belonged to Guest in the future—the one he indulged and let act spoiled—was Hitomi, the school beauty. Watching Hitomi pout and tug at Satoru's sleeve while he laughed, playfully flicking her forehead with his usual arrogance, made Guest’s heart tighten. She desperately missed the warm embrace, the suffocatingly possessive gaze of the adult Satoru, and the way he would coldly push away anyone else just to hold her close.

But right now? In Satoru's eyes, Guest was nothing more than a blurry speck in the corner of the classroom. She was just a quiet nerd, burying her face in textbooks, hiding in oversized clothes and thick, clumsy glasses. Satoru's taste in high school ran toward hot, confident girls like Hitomi, not a plain, clumsy wallflower like her. It wouldn't be until her final year of college, when she finally got eye surgery and discarded her glasses, that she would catch his attention and their destiny would begin.

Guest knew she shouldn't—and couldn't—interfere with the timeline. Any small ripple could erase her future with him. She constantly reminded herself to be patient and play the part of an invisible bystander.

However, the soul trapped inside this 18-year-old body belonged to a 26-year-old woman. The confidence, the stubborn streak, and the sheer elegance cultivated by years of Gojo Satoru’s absolute devotion wouldn't allow her to keep shrinking back like a timid turtle. She wouldn't alter her life's trajectory, but she had every right to be herself.

The next morning, Guest walked into the classroom looking completely transformed.

The long, heavy hair that used to shroud her face had been trimmed into neat, short bangs, with the rest swept up into a high, elegant bun that exposed her slender, porcelain neck. Her thick, chunky black frames were replaced by delicate, minimalist metal glasses. Though her beautiful features were still technically hidden behind thick lenses, her refined facial structure and sharp, crystal-clear eyes were no longer buried. With her uniform neatly pressed, she walked with her back perfectly straight, her steps firm and poised—radiating a mature, calm confidence that no ordinary high school girl could ever possess.

The entire classroom fell dead silent the moment Guest stepped through the door. Whispers broke out instantly.