How do you get the Kira bad end? I can only get Dio with Josuke's route. I'm trying to do all the endings and this is the only one I think I'm missing.
For the Kira one, you need to choose the option to pull away from Joskue when you're cleaning up the mess he made in science class. When you take out the trash, you cut your hand and Kira asks you if you need help. Say yes and the ending will play out from there.