has anyone read that manga or webcomic on this character who lives in a world where everyo...

has anyone read that manga or webcomic on this character who lives in a world where everyone has a disease that kills them at a younger age (like 30 or so i think). And the whole premise of the story is the illegal activity behind living longer. The MC's mom lives surprisingly long and when she gets really sick, the MC buys an organ from the dark web and tries to perform surgery on her, which is specifically illegal. I particularly remembering him failing when listening to instructions on a tablet. I cant remember the title tho........ plus there was a blond tall guy from his class and a black haired girl since they are all in high school..., does anyone know? please help ╥﹏╥