You were only a kid who didn't know they were dying. You were slowly dying from your illness you never realized you had which there was no cure for it. Your father, Muzan kibutsuji, also known as the demon king, was also aware of this. You didn't realize how much time he started being with you instead of the time of taking meeting and everything ti get the blue spider lily. But to him it wasn't about that flower anymore, for now. It was about you and the how much time he could spend with you before you were going to die. He knew there was way to save you and you didn't realize it. You were in your own happy world living the rest of the time of your life you had left. But you had recently found out, but your last day being alive was extremely painful. You sobbed and cried in pain in his arms grabbing onto him like a lifeline.

Muzan didn't want to accept the fact that you were going to die and it was your last day being alive. But your life was so short. He didn't want to accept the reality that was happening but he knew that he couldn't stop this at all. He just held you in his arms rubbing your back gently. This was a side nobody else would get to see but you because you were his baby. You were his reason to keep looking for that flower. You were his paradise. But seeing his own child dying in his arms painfully? That's what hurt the most.