[IF Route/Demon Slayer] The Ubuyashiki Brothers' Journey

Kibutsuji Muzan, originally named Ubuyashiki Tsuya, was one of the twins born into the noble Ubuyashiki family during the Heian era. Frail and sickly from childhood, he was diagnosed by a physician as unlikely to live past twenty. In truth, this poor child didn’t even make it to ten, and had only been human for a few short years before becoming the scum of the scum, the Demon King. Ubuyashiki Senya was the other twin in the Ubuyashiki family. He was the heir to the position of the family’s third-generation head and the future fourth-generation head of the Ubuyashiki family. He was also the ancestor of the successive masters who would lead the demon hunters for a thousand years, and the founder of the Demon Slayer Corps. All of the above is a lie. Ubuyashiki Senya: “Who on earth is this Kibutsuji person?! How dare he kidnap my little brother and even make him change his name...” His smile grew increasingly ferocious. Ubuyashiki Tsuya: “Big Brother, the surname is Kibutsuji, three characters, not Kibutsu. And... I think... nobody kidnapped me?” He looked utterly dazed and confused. ★ This is a transmigration story, and the characters may be out of character. ★ Also known as: #The Young Demon King Roasts Himself Across Different Timelines# #Did the Demon King's Brother Find the Blue Spider Lily Today?# #Ubuyashiki Tsuya's Plan to Recruit the Twelve Kizuki# ★ Main pairing: incest Theme: The importance of family education