Demon Slayer: Tanjiro Is Reborn and Starts Out as a Demon

Tanjiro Kamado died at the age of 25 from the side effects of his mark, but his soul returned to the day his family was killed and his younger sister was turned into a demon.

Drawing on his experience killing demons in his previous life, Tanjiro saved his family and sister, only to fall victim to Muzan Kibutsuji and become a demon himself.

But with his unwavering will, Tanjiro broke free from Muzan Kibutsuji's control, just as his sister once had, and became a demon who could withstand sunlight.

Thus was born a sun demon, determined to slay every demon and unafraid of sunlight!

Tanjiro Kamado vows to make up for the regrets of his previous life, wipe out every evil demon in the world, and protect everyone.