Six Eyes Begins in Demon Slayer

(It won’t get too ridiculous. The Six Eyes need time to grow, too. Gojo Satoru would be overkill against Muzan. I probably won’t include a heroine, or pairing him with Shinobu could work. I won’t mess with canon couples. If there are plot problems, I can revise them.) A hardcore anime fan unexpectedly transmigrates into Demon Slayer as an ordinary person. While out gathering herbs, he runs into a demon. On the verge of death, his intense frustration at having transmigrated without being able to change the original story’s heartbreaking outcomes successfully activates the System, granting him the “Six Eyes” in their childhood form…

Beneath the rising sun by the Mugen Train, the figure who fell with a hearty smile~ Beneath the wisteria trees, the girl who finally smiled... This time, I’ll change everything!