Kokushibo's new young brother

Tanjiro has to choose wether to accept him as his nii-san or he refuses and all of his loved ones will perish in front of his eyes.... What will he choose???

~Breathe~ Kimetsu no Yaiba x !Demon! Reader

Breathe y/n.... breathe.... It's not worth it. He's not food. Their not food. Just-... breathe. I can make it. I can save them. I thought to myself as I resisted the urge to gorge on the rotting corpses around me... my family. How did this happen? Why did this happen? I grip my hair tightly. Mixed emotions welling up...