The son of the demon king

Preparing

Sorry I took so long guys school kept me busy so sorry

Tanjiro gasped and fell onto the snow in pure exhaustion, he breathed in feeling his lungs burn up

"Get up, your training is not finished"

Tanjiro then slowly got up facing yorrichi, tanjiro had trained for the past three months in the mountains as yorrichi had trained tanjiro in using sun breathing

Tanjiro only learned the first three forms of sun breathing, since he wasn't like a regular demon he had increased stamina not unlimited stamina like most demons and his regeneration was slow unlike other demons plus he needed sleep to recover energy from his training

Tanjiro had used his times when he wasn't training and clean off the rust of yorrichi's sword or doing further research into the cure for demons, sighing tanjiro took a stance as he preformed sun breathing

"Sun breathing........fourth form: ........... burning bones, summer sun!"

Then unleashing a large circular slash in front of him, coughing tanjiro hits his chest feeling his lungs burn and getting dry from the pain of using sun breathing

Tanjiro then grits his teeth as he does it again

"Sun breathing, fourth form: burning bones, summer sun!"

Then doing the form again tanjiro feels the effect again but less painful then before, tanjiro then smiled as he pumps his fist up on the air

"Yeaaaahh!"

Then breathing in tanjiro looks at yorrichi, with a serious face he bows to the ghost of the legendary demon slayer and greatest swords man in the world

"Thank you for teaching me, am internally greatful for you teachings"
"Your welcome, but I sense that you have something in mind?"
" *sigh* well I haven't gotten much work done in making the cure for the demon transformation, so this is where I finally put that training to good use"

Humming in response yorrichi fades away as tanjiro goes inside his home and retrieves yorrichi's sword, it had taken tanjiro a week to clean as he wasn't an expert in cleaning swords or getting rid years of the rust off the sword, tanjiro did managed to clean the sword so now he had a fine crafted sword

Putting on a mask similar to a ninja mask and wearing a black kamino tanjiro sets off to get blood for his research into a cure and his first target would break his heart

In a city

Sighing a beautiful women looks in the mirror putting on makeup, she attempted to put it on properly but she trembled remembering what made her depressed

Falling off her chair she cries on the ground and bangs her hand on the ground, a sliding door opens quickly as a man runs to the women and hugs her

"Hay hay now, what's the matter?"
"I-it's him......I-I got a-another m-memory of h-him...."
" *sigh* I know, I know I miss him too....."
"I-*sniff*-I just w-want my baby b-back...."
"Daki you need to take care of yourself, you barely eaten and haven't come out of your room in months. On top of that you been sad and depressed for these past months so please move on"
"NO!! HE WAS MY BABY! MY SON!! I'LL FUCKING KILL THOSE WHO ARE RESPONSIBLE FOR HIS DEATH!! MARK MY WORDS I'LL DRAG THEM TO THE DEEPEST PARTS OF HELL ITSELF!!!!"

Lowering his head gyutaro thought about the events that happened these past few months, all of the upper moons have been sad, depressed or angry as all of them wanted bloody revenge for tanjiro's death

Muzan was the most sadden over tanjiro's death but the most angriest, gyutaro had observed muzan's behavior by noticing his talks to Nakime about the location of trapping the hashira and looking more focused on setting the trap for the hashira