Cinderella boy; young man who becomes famous overnight
Wasei-eigo term for a previously unknown young man who suddenly achieves fame or success, analogous to a 'Cinderella story' but for males. Often used in entertainment or sports contexts.
wasei-eigo (Japanese-coined English), from Cinderella boy
See also: シンデレラガール
He won the audition show and became a Cinderella boy overnight.
That new actor is a real Cinderella boy, isn't he?