I Have Been Living in the City for Ten Years and No One Knows That I Have Become an Immortal.

Gu Fan, who graduated from college, has a mysterious fairy mountain inside his body. From then on, a heaven-defying journey of "cultivating immortality within the body" began. He practiced in the busy city, refined his mind in the world of mortals, secretly planned things, and stirred up the situation. Whether it is a rich and powerful chaebol or a family that has been cultivating immortals for thousands of years, they will all witness an unprecedented myth. And all of this started when Gu Fan accidentally fell off a cliff...