It all started when nezuko was sleeping in her room as usual when her mother called her
Kie : Nezuko can you sell charcoal because Tanjiro is busy ?
Nezuko: sure mother I will be leaving soon anyways
Kie : thank you nezuko
Hanako: née-San can I come with you ?
Nezuko: sure Hanako
Kie : stay safe you two
Nezuko & Hanako : we will
After they sells the charcoal they were going back home but they were stopped by Saburo
Saburo: Girls What are you doing come inside you don't want t run into demons
They agreed and went inside and stayed there for the night
In the morning they went back to the house but they smelled a lot of blood
They ran to their house to find Tanjiro in a pool of blood
Nezuko:TANJIRO
Hanako: Where is mom rokuta and Shigeru and takeo?!
They went in to see them but they died
Since Tanjiro was still warm they tried to at least save him
Nezuko : Okay um I carry Tanjiro okay ?!
Hanako : Yes okay
in the middle of running to the village doctor Tanjiro started to growl and push so they fell off the cliff
After they regained consciousness they saw Tanjiro standing looking down
Nezuko : Tanjiro ! You shouldn't stand up
Hanako : let us carry you !
he looked up and attacked Nezuko
Nezuko: TANJIRO ?!
Nezuko P.O.V:How can Tanjiro Be demon...
....he was human when he was born
Hanako: NII-CHAN DON'T DO THIS PLEASE DON'T TURN INTO DEMON
After hearing what Hanako said tears formed in Tanjiro's eyes
All the sudden A Woman was aiming to kill Tanjiro
But Nezuko blocked her attack
Shinobu : Why did you Block my attacks I am impressed
Nezuko & Hanako : he i our brothers
Shinobu : I am sorry I will use gentle poison so he don't suffer
Then she aimed at Tanjiro once again nezuko tried to block it but she took him captive
Nezuko & Hanako : Please don't hurt my big brother
They both bowed their heads on the snow
Shinobu: why are you acting like you are weak !
They both looked up
Shinobu: if you act weak people will take advantage of you
Then Shinobu Stabbed Tanjiro (but without poison)
Nezuko : STOP IT !!!
Hanako : Née-San Wait !
Nezuko threw rocks At Shinobu but she kept blocking the rock
Then nezuko charged at Shinobu but Shinobu knocked her out cold
Shinobu : where is her hatchet ?!
Then Hanako charged at her as well but she also knocked her out
Tanjiro saw that nezuko and Hanako tried to protect him so he kicked Shinobu picked up Hanako and ran towards nezuko to sheld her
Shinobu : how is this possible !?
Tanjiro: DON'T HURT MY SISTERS !!
He charged at Shinobu but she also knocked him out
After Nezuko and Hanako Woke up they saw Tanjiro laying on the ground still stained with blood on his kimono
Shinobu : Moshi Moshi are you awake ?
Nezuko and Hanako looked at Shinobu while hugging Tanjiro to protect him
Shinobu : Would you like to train to become demon slayers ?
Nezuko : Yes but where do we train ?
Shinobu: at my place
Nezuko : Okay
Shinobu : Tell me your names and the demon child's name
Nezuko :I am nezuko
Hanako: I am Hanako and the boy is my brother Tanjiro
Shinobu: Okay you will train with a girl named Kanao Tsuyuri and I am a medical doctor
named Shinobu