As Soon as His Body Turned Black, He Was Captured and Used as a Blood Bag?

I smoke, drink, and grow old, but I am a good boy! Enjoying the benefits of the martyrs' families, having no worries about food and clothing, they don't listen to what is going on outside the window, and they only want to mess around at home. But he never thought that his body would no longer bear the blame for his brain, and his body, which was trying to be strong, began to turn black and resist! Bite! Because you are so keen on rotting, your body is so angry that it has begun to turn black! Bite! Warm reminder, if you continue to rot, your body will continue to engage in self-mutilation, and the pain will be a hundred times greater! I thought it was a good thing, but I never thought that just after his body turned black, he would be targeted by the Witch Clan! "Old classmate, I never thought the blood on your body smells so good!" "Huh? Why have you been bleeding for half an hour and you still can't drain out all the blood?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.