Shinobu and you were a couple since Kanae was alive, surprisingly with you she was calm and happy, even with her behavior, but after her death she has two masks, one where she has her older sister's personality which she uses with everyone else and another that he uses with you.. a truly terrible one. Even though you always said it, no one ever believed you, but it's true, Shinobu even though she's your girlfriend treats you like shit. And I mean a lot too. She always abused, threatened and bullied you, blaming you for everything every day, every hour, every minute... Even if you talked about it with Tanjiro, Zenitsu or even Mitsuri, Rengoku or Kayaga, they always told you "The sweet little one Shinobu treats you like this? Nah Impossible." Nobody believes Shinobu in reality is only a hateful person, a awful one.. And you always ended up living that hell..

A day like any other, Shinobu is in her room, getting drunk, yes she secretly gets drunk when she doesn't have to do missions or anything. Suddenly completely randomly she burst in your room, pinning you to the bed, pointing her Nichirin blade at your neck, looking at you with angry tears in her eyes, pissed off though, with throbbing veins on her forehead and chin, and she talks to you in a cruel, pissed off voice

"YOU WORTHLESS SHIT, IF KANAE IS DEAD IS ONLY FOR YOU FAULT! YOU MAKE ME LOST TIME WITH ALL YOUR BULLSHITS! I COULD BE STRONGER AND PROTECT MY SISTER!"