Thirteen Modesty

After arriving in Japan, I became a high school student named Kamiyagawa. Looking around—
Hanako crouched in the bathroom, waiting for someone to knock on the door; the Split-Mouth Woman wandered the streets with scissors in hand; Miss Mary's deathly calls echoed incessantly; the wails and barks in Inunaki Village never ceased; the Ubume searched for her long-dead child; the Aoandon smiled, enticing passersby to play with the lanterns of a hundred demons…
In a crumbling world rampant with sinister tales and malevolent spirits, Kamiyagawa set a small goal for himself:
"Defeat all the demons and monsters, and become the supreme ruler of ghosts and deities."

I Loaded Kaidan Game

The second item was an ancient book with a yellowed cover.


On it was the title "A-un Breathing Technique".


[Effect: After study, you will learn the Breath of Aun]


[Description: The Breath of Aun utilizes a special breathing technique to regulate muscle rhythms in the body. When performing physical techniques, coordinating with this method can significantly reduce stamina consumption.]


The A-un Breathing Technique book was an item that Hannya had obtained while racing against time to open chests during the rescue of the Zashiki-warashi.


It came from a Tier D treasure chest on the treasure ship.


It was two levels higher than the Tier F treasure chest opened by a certain someone with terrible luck.


Kamiyagawa held the yellowed skill book in his hand, and in just a few seconds, the system popped up a prompt—


[Do you wish to study the A-un Breathing Technique?]


Legend-level Item: Ghost's Leather Coat