After their victory in the Phoenix Festival, Yuna and her friends were invited to visit the Shadow Academy, a prestigious academy for students who specialize in stealth and assassination techniques. Yuna was initially hesitant about visiting the academy, but she was curious about what the academy had to offer.

Upon arrival, Yuna and her friends were greeted by the headmaster of the academy, a mysterious figure known only as "The Shadow." The headmaster offered to give them a tour of the academy and demonstrate some of the techniques that the students were learning.

As they walked through the academy, Yuna couldn't help but feel uneasy. The atmosphere was dark and foreboding, and she could sense a sinister presence lurking in the shadows. Despite her apprehension, she was determined to learn as much as she could about the techniques that the academy had to offer.

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During the tour, Yuna and her friends were introduced to some of the students at the academy. They were all highly skilled in the arts of stealth and assassination, and Yuna was impressed by their abilities. However, she couldn't shake the feeling that there was something off about the academy.

As the tour came to an end, The Shadow revealed that he had a proposition for Yuna. He offered to teach her some of the academy's most advanced techniques, but in exchange, she would have to agree to help him with a secret mission.

Yuna was hesitant to accept the offer, but she knew that the techniques would be invaluable in her future battles. She agreed to The Shadow's terms and began her training at the academy.

Little did Yuna know, she was about to get herself caught up in a dangerous game of espionage and betrayal. The Shadow Academy had a dark secret, and Yuna was about to uncover it.