[No System, but a Golden Finger + Poor Physical Talent + From Average Joe to Genius + Background Character + Slow Burn + Joins the Demon Slayer Corps in the Same Year as Tanjiro + Setting May Be Altered + Just Writing for Fun + Experimental]
What would happen if you transmigrated into the body of a background character in the Demon Slayer Corps, one with poor talent and a desperate urge to get ahead?
