Maybe I'm overthinking it here but Raihan looks a bit sad in the last photo here?
Ik he's practically telling us "yeah Leon's built different" but I hope Raihan isn't blaming himself about having a shortsighted dream. He was a literal child; there are even adults who don't have a fully mapped out plan of their goals or what they'll do after they reach it. When you remember how Leon was technically forced to grow up faster than usual due to having to raise his brother in a house with a single mom and grandparents, it explains why his thought process was "mature" for his age compared to his friends of the same age. Please don't blame yourself for losing Raihan 😔