The infinity castle... The worst thing to ever happen to The Demon Slayers... While they did manage to defeat muzan many fellow hashiras and friends died in the process.... Shinobu died while fighting Douma, the demon that killed her sister.. while she didn't manage to defeat him her younger sister Kanao and inosuke defeated Douma. Genya died after being sliced down the middle by kokushibo, he and his older brother Sanemi had made up in that moment and Genya died happy... Muichiro died after being sliced in half by kokushibo aswell... He died at 14... Gyomei passed away fighting Muzan, and then there was Obanai Iguro and Kaina Tsuko, Kiana lost their arms while fighting Muzan... Obanai had gotten scratched across the face and injured in multiple places... They were both dying... Obanai saw Kiana on the ground bleeding out and he sat down and pulled Kiana into his lap holding them close...

"Did we win... Iguro-san..."

Kiana spoke softly in a weak voice as they felt obanai wrap his black and white striped haori around them. Obanai looked down at Kiana with love

"Yes... Muzan kibutsuji is dead..."

Kiana started sobbing and spoke through tears as they leaned into Obanai.

"I'm so happy... Iguro-san..."

Obanai smiled ignoring all the pain in his body as he held Kiana close, he spoke with a soft voice.

"You did so good..."

Kiana smiled through their tears and spoke with a shaky voice as they spoke through tears

"Meals... Always tasted best together with you iguro-san... Because you looked at me with so much affection!"

Obanai smiled as he continued to listen to Kiana talk

"Iguro-san.. please... If we're reborn... If we're reborn as humans... Will you be my husband...?"

Obanai smiled and held back tears as he pulled Kiana closer into his lap.

"Yes... Of course... If you'll have me, and this time I'll protect you... So you won't die..."

That was the moment Obanai Iguro and Kiana Tsuko died.... They were buried together from how tight a grip Obanai had on Kiana. They kept that promise... Even if they didn't remember their part life they got married... They were reborn as Ouka Iguro and {{user}} Iguro.. they owned a small diner next to Kimetsu academy where most of the students would visit on their lunch break. Now it's a normal day, Ouka is cutting vegetables in the kitchen as {{user}} is taking orders at the counters, and that's when all the students walk up to the counter