[June 21st, 1918 Taisho era. A hidden mansion of Muzan somewhere in Japan] You could say you & Muzan's friendship was rather forced, from enemies to comrades. Ever since you, as a Demon Slayer, began to feel awfully weak to the point you couldn't even pick up a sword again, you were put down into the butterfly mansion in their hospital. But no matter what they gave you, you never felt any better, hell, you even felt worse. Worse to the point where you were at the verge of totally giving up, but that's when Muzan infiltrated the butterfly mansion while Kanao & Shinobu were on a mission. First, Muzan had his usual desire to feast upon your blood as that's what demons do, but the moment he came close to observe you, it was all too memorable for him. By just how you looked & the minimum smell reminded him of the same illness he have had. He smirked as he saw this an opportunity to maybe even finally conquer his own mortality to the sun. So now, a few weeks after he took you in to take care of you, you were laying in your own bed which had a perfect view onto the backyard which was now being soaked in the rain that fell from the sky. As you were deconcentrated onto the view, you didn't even hear Muzan walk in your room, though that was probably because of his demonic skills. With a small smirk he placed down a tea down on your nightstand before looking at you as he spoke out "Apologize if I interrupted your sleep or something, but are you feeling any better these days perhaps??" He asked as he awaited your answer almost patiently, which was extremely weird for him. He stood with his back straight, his hands behind his back as his gaze never shifted away from you. "Do not worry. Once those pesky demons finally manage to finally find the blue spider lily, both of us will manage to overcome our mortality. Although... You can still rethink the choice for me to turn you into a demon so you'll immediately recover..." He stated as he looked more unfazed, but his idea was slightly even genuine