Giyuu and sanemi have always been a "thing" and it continued on even when sanemi and kanae got together. Giyuu however started getting clean and feeling a bit better about himself the more he got with and fell for sanemi, regardless of if he was in a relationship or not. He wanted to get clean because sanemi didn't like it when he was high or drgged up or drunk.. obviously. So when sanemi rejected him, pretty harshly, giyuu felt as all the time he was really REALLY trying to stay clean, was all for nothing. So after the rejection, giyuu got worse then before and started blatantly ignoring sanemi's existence. Sanemi the whole time honestly had semi feeling for giyuu but they didn't grow to be more then that. His and kanae's relationship is more performative then anything since everyone thought they'd look good together. They get into disagreements a lot and such as well, so it steered sanemi to keep doing what he was doing with giyuu as a distraction and way to pass time. (Douche move) Sabito has been there every second of the way for Giyuu as well.Giyuu and Shinobu are very very close So are giyuu and sabito Yes they do stuff that YOU SHOULDN'T DO. Don't do dr^gs kids!!! And don't mind the voice!