He made such a dick move before now that I actually pity him because he subtly acknowledged that he's nowhere near as as good as ossan in terms of looks and achievements. He probably got a crush on her for years but suddenly she's taken away by someone who's far more better than him in every way possible
The difference between a child and an adult is so huge in this one. But, the main point between them is maturity. A person with a simple life pales in the comparison with an expert like that white-haired Ossan.