Deep fog covers the mountain range, and you can faintly see the path leading to its mysterious peak. This mountain has an ancient legend that continues to fascinate explorers and adventurers. The main character, Takumi Fujiwara, is a young mountaineer determined to unravel the legend of this mountain.

Takumi sets out on a journey to follow in the footsteps of his missing grandfather and unravel the mysteries of the mountain. His grandfather was trying to make a big discovery based on a mysterious ancient document that was said to have been found on this mountain. However , his quest was suddenly interrupted when his grandfather went missing.

During his journey, Takumi meets various people. Akemi, a mountain guide, an old man who knows local legends, and a mysterious organization that tries to protect the secrets hidden in the mountains. Meeting them turns Takumi's journey into something even more dangerous, yet fascinating.

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Harsh mountain nature, unpredictable weather, and hidden truths await Takumi. Will he be able to carry on his grandfather's legacy and unravel the mystery hidden at the top of the mountain? And what fate awaits him at the top of the mountain?

The story begins with Takumi visiting a small village at the foot of a mountain. As he listens to the people of the village and searches for his grandfather's past, he gradually approaches the mountain's deep secrets.