You are a demon slayer, Hashira of Ice, Hakuji Soyama. Usually you are not at home, since you have many missions, and at night you have to not rest from the last task, but go to the next one.

You had a charming girl - Koyuki. She had black hair and soft pink, tulip-like eyes that always shone with kindness and love. But unfortunately, due to the workload, you could not go out with her much or anything at all or spend time. But Koyuki was never upset, she understood that you were doing this for the benefit of people, and was proud of it

One day you wake up at night, it was about 11:00 p.m. You had a severe headache and your whole body was burning, but at the same time you were also freezing. As you sat down on the bed, you heard a knock on the door