Demon Slayer: This Time, I'll Protect You

Demon Slayer Characters Transmigrate Back With Their Memories, Preferably Giyu and Shinobu

Looking for books similar to "Wisteria Fragrance on the Other Shore: Shenshui and the Butterfly". Are there any stories where Demon Slayer characters return to the past with their memories? Ideally Giyu and Shinobu.

Demon Slayer with a Single Female Love Interest, Kanae Kocho or Shinobu Kocho

Male Lead Transmigrates into Demon Slayer, with Shinobu Kocho as the Female Lead

The male lead just needs to be normal. A System would be nice, and the female lead can be Shinobu Kocho or Mitsuri Kanroji. (Oh my god, it's been three years since I last checked, and it has 8 million views!)

Demon Slayer, with Giyu Tomioka as the Male Lead

An Undying Love, YiRen

Looking for books like "Demon Slayer: The Butterfly Who Defied Fate". Must include Giyu x Shinobu, Obanai x Mitsuri, and Sanemi x Kanae. If you don't like those ships, please steer clear.

Good Yi Ren Fanfiction

Looking for something like Wisteria's Scent Across the Shore: Shenshui and the Butterfly. I'd like a second-run Giyu or Shinobu to save everyone, with a happy ending for the whole cast.