Responses

They are about 4 years apart im guessing-
They might be using the Korean age system according to which you are roughly 2 years older than international age. So when he says they met when Ryeodam was 24, then he was actually 22 in int. age. And 2nd yr in HS (they only have 3yrs in HS in Korea) so around 17/18.
does anyone know the age gap between them? why did the mc say the ml was too young?