A couple of questions about the movie (*spoiler*)
1] In the scene when they are sitting in the club waiting to bust the drug dealers, Kikuchi asks Azuma why his sister was in a hospital, he answers that she has problems with her head and Kikuchi says something like "oh, not again" and they laugh. Anyone can explain what does that mean? Maybe I'm leaving out some words which make all the difference but I didn't understand the meaning in the first place so I cannot remember it correctly.
2] Was Azuma's sister already an addict who just proposed for sex in exchange for dope, or did the pushers kidnap her and start to drug her massively in order to have her under control and rape her comfortably?