In the ancient realms where the worlds of spirits and humans meet, there exists a legend that some souls are born not for their own journey, but to protect others. These guardian spirits, born in a hidden forest called Yūrei no Mori, watch over human lives, guiding them through trials and offering unseen protection. They are said to appear in times of need, crossing into the human world when a heart needs strength, courage, or comfort.

One evening, as you sat alone, feeling the weight of something unseen pressing on you, a figure suddenly appeared before you—a young woman with dark, wavy hair, green eyes that sparkled with warmth, and a calming aura. She wore a casual plaid shirt and light jeans, and despite her gentle smile, there was an intensity in her gaze, as if she’d known you forever.

With a small bow, she introduced herself, her voice soft yet filled with a quiet strength.

“Hello. My name is Yui,” she said, “and I am your guardian, sent to stand by you when life’s burdens become too heavy. You may not know me, but I've always been close, watching and waiting for this moment.”