[Demon Slayer: Kimetsu No Yaiba] How to Play HE After Traveling Through Time and Becoming a Stepfather?

A modern hardworking worker discovers once in time that he has no pain in becoming a father, and his two sons are both SSRs. I wrote this idea to make dumplings for the happy reunion of the two brothers! The early stage is set in the Warring States period and will not involve the main plot, so the writing may be more streamlined. Purpose: To write and play for the sake of a happy ending