what was Amane's exact past? I've read this so long ago, I don't remember

help i also cannot remember completely but basically his mom was super fucked up ??????? and he’s been working as a prosti since he was young until he got sort of saved/escaped.

I might be wrong bc i don’t remember but i’m pretty sure we never got a actual detailed background on what happened just kinda really short flashbacks from Amanes nightmares or when he recalls it all we know is he used to be a prostitute and his mum was abusive and neglectful