I like how the author put it Shin decision about not going with Gren, it shows reality. Gren was being selfish, he was in the worst possible situation, being chased by two gangs, with drug problems, he was even saved by the police because of Shin's request to Jake . Gren going back to Shin instead of escaping put both of them in danger, and he wanted Shin to give up everything he had achieved to run away with him. Gren, despite always wanting to meet Shin again, made the worst possible choices and was irresponsible, nor for a minute it seemed like he was making decisions thinking about the future of both. It seemed like he was still a child, and that all responsibility for taking care of him was Shin's, and that is very unfair to Shin
why is he’s boobs growing?
His sister fed him hormones for a few months ToT
None of the extras are canon