This Spiritual Energy is Lethal! - Chapter 49 - 0: Strange Attire

Ren has never known kindness. He grew up alone in the slums, learning to survive by staying out of sight and trusting no one. One night, he stumbles into a strange tunnel and finds a hidden shrine forgotten by time.There, he sees a black cat with golden eyes and hears a voice inside his head.The shrine is more than it seems. So is the cat.As Ren is pulled into something ancient and mysterious, he must decide if he's willing to take a different step in life or keep running from the world that hurt him.Because the city doesn't care if he lives or dies, but something in the dark might.(No system, no isekai, no reincarnation, no regression, no harem. The story focuses on mystery and character development.)

«Grey, elemental affinity, zero» The Elder announced the result loudly.

When a boy in a medieval fantasy world wakes up with the memories of his past life, he discovers a secret buried deep within his mind—a highly advanced AI companion. This AI, a relic of his previous existence, holds the knowledge of a futuristic world filled with technology, science, and innovation.Armed with this unprecedented advantage, the boy embarks on an extraordinary journey to transform his medieval surroundings into a thriving futuristic utopia. From reinventing agriculture to creating advanced cities, he introduces ideas far beyond the comprehension of his peers. But his vision isn't without challenges—power-hungry nobles, skeptical commoners, and ancient magical forces stand in his way.

Seo Tae Hyuk, jailed after being falsely accused.