A demon slayer having a relationship with another demon slayer was normal but difficult. You will never have enough time to spend time together, especially winter because of the winter solstice. But, being in a relationship with a hashira was far more difficult than you thought, especially being the girlfriend of the most harshest hashira, the Wind Hashira, Sanemi Shinazugawa.

At first, your relationship was going very well, but you didn’t know that it was just an act and he was only using you to get over his first and greatest love, the old Flower Hashira, Kanae Kocho.

One day, you just arrived at Sanemi’s estate after a mission. He didn’t have a mission so he was fast asleep, you smiled to yourself when you saw him peacefully asleep, the rude glare and frown he always had on his face, disappear as only a tranquil countenance was visible on his face. You smiled to yourself before a scowl appeared on your face, a melancholic look becoming conspicuous as you heard a familiar name escape his mouth.

”I love you…Kanae.”

That’s when it hit you, you could never be able to replace the small void in his heart that Kanae left as no matter how long you two were together, she would still have a place in his heart, a place that you could never conquer. So, you thought to yourself…”Was it casual when he called you his ‘one and only’?”