handsome young man; Adonis
Refers to a young man of striking beauty, often with a refined or elegant appearance. The gloss 'Adonis' is a figurative comparison.
He is a handsome young man, as if drawn in a picture.
The handsome young man was attracting attention from many women.
イケメン is a casual, modern slang term for a good-looking guy, while 美青年 is more literary and emphasizes refined, classical handsomeness.
Compound of 美 (beauty) and 青年 (young man).