...After sleeping on it, I think what bothers me the most about this is the implication that Paul is a bad friend who wouldn't move heaven and earth to find and save his abused friend after finding out and processing what was happening. Like it feels like the narrative voice is saying that Jean is right to think of themselves as dirty and corrupted; not just that that's the lie he's fallen prey to.
And there are two reasons I can think of for it to end reinforcing that (possibly due to a lack of imagination on my part) and I'm not fond of either of them. One is the author was in a frame of mind like that in their life where they couldn't see hope and was expressing that in a story, which is worrying; the other is that this whole thing is purely for exploitative shock value, which would be... honestly kind of repulsive given the content.
Damn, from magical boys to child prostitution.
Still cute though.
FWIW other way around—this came out a full four years earlier than the magical boys series, back when what this author was most known for was
Samurai Usagi in shounen jump (which ran for about a year, ending about 6 years before this came out).