Okay, so that was really something. I didn't expect it to play out the way it did. đ€
But I liked how you handled this (very weighty) subject. The characters are believable, they have clear motivations for acting the way they do, and the story feels pretty grounded in reality. I could see it happen in real-life circumstances.
Now, Matthieu is a total trainwreck. He acts all lovey-dovey one second and feels terribly guilty the next. I even felt bad for him for a bit there. But! Ultimately, his guilt means little since he won't do anything about it. He lets this child manipulate him when he should know better and just end things with her. Does that make him a monster? I'm not sure. It seems that he's not mentally well overall so there might be more factors at play there. (which doesn't excuse him in the slightest, but still)
And Chloe. Chloe is obviously the victim here but that doesn't mean she's a perfect little angel either. She claims to be mature and looks down on her peers but the way she acts about this relationship only proves otherwise. She even manipulates Matthieu to get her way. (which, again, he shouldn't fall for since he's an adult) But I think in that, you captured the way teens think about love and relationships; as if it's the be-all, end-all of their lives.
(Also, Lucie is a ray of sunshine and should be protected at all costs.)
All in all, the game is pretty heavy but I'm glad that it ends on a positive note (I think I got the good ending?). And tbh, I've got a lot of mixed feelings about the story as a whole but that's probably good. I think you successfully explored this idea without romanticizing it but also without leaning into that 'he's evil and there's that' narrative. So, good job!
Also, as a side note, I really liked the poems! They had a nice flow. ^^