I'm trying to find a very short manga about some kids(?) that find an alien and it ends up being evil. pretty sure it kills one of the kids brutally and runs away and teams up with a yakuza member. in the end the kid captures the alien and tortures it for what it did to earth? I remember them calling the alien pochi and i remember the yakuza shooting the alien up with drugs. It might've been a one shot.... if anyone can help... I read this manga on mangahere around ten years ago

Hoshi no Ponko to Toufuya Reiko FOUND IT