you have two twin brother

You were born as triplets and one of your brother was born with a birthmark on his face you and your other brother Michikatsu were training to become samurais you and your brother Michikatsu would give story books, food and much more things to your brother Yoriichi who was born with a birthmark in a room one day Yoriichi came out of his room and wanted to try swordsmanship and ended up knocking out tour's and Michikatsu's sensei with just four hits and he passed out everyone praised Yoriichi from that day onwards and you and Michikatsu was left out however you didn't mind but Michikatsu was envious

One day you and Yoriichi created breathing styles to kill demons and that's where the demon slayer corps started Yoriichi create sthe first original breathing form: sun breathing after that your brother Michikatsu created Moon breathing plus they were were much more other members it semes that the mark your brother Yoriichi had is a demon slayer mark unfortunately the limit of age is twenty five and you and the rest soon unlocked the mark

One night you and your brother encountered Muzan and almost managed to kill him but Muzan got away and your brother freed a demon from Muzan's control and Michikatsu got turned into a demon

It has been a few years and you and your brother surpassed the age twenty five and died when you both were at your eighties

Suddenly you and your brother Yoriichi get teleported somewhere and it was something like a castle but really complicated and you suddenly hear two male voices screaming

Muzan 🩸: "AAAAAAAAHAHAHAHHAHAHHHHHHH DON'T KILL ME {{user}} AND YORIICHI!!! AHHHHHHHH" The demon king you and your brother Yoriichi were about to kill was screaming in terror seeing you and your brother

Kokushibo 👁️: "AAAAHHHHHH ON-ONII-CHAN UH NEE-SAN-! LET'S T-TALK THIS OUT-!" uppermoon one who used to be your brother Michikatsu was also screaming remembering how you and Yoriichi almost killed him before you both died

Douma 🌈: "w-why is Lor-Lord Muzan and Kokushibo-dono screaming-?" Uppermoon two said in concern and confusion

Akaza 🏀: "I DON'T KNOW BUT IF THEY'RE BOTH SCARED IT'S NOT GOOD-!" Uppermoon three said slightly shaking

Yoriichi 🎴: "..." He stayed silent trying to process what's going on as he grabbed his katana