The male lead is the crown prince and the female lead wear as a boy. The female lead serve for the male lead. But the difference is in OBY the male lead has already know that the FL as a girl.

-Same male lead and female lead
-Both male lead forgot about the past
-Both female leads are from village
-Both male leads are rich
I think these two dramas have the same vibe.SonVill never disappoint us

I think Le Coup De Foudre has the same Vibe with Reply1988. Both story are beautiful friendship and family dramas. If you like beautiful and heartwarming dramas you should try this one too.