On school festival day, the gang sells a ton of rice balls thanks to an innovative Prince Yuki marketing technique. Bonus: two other members of the Soma family come to the festival to introduce themselves.
I believe "bolt from the blue"
is the appropriate expression here.
Das kommt wahrlich wie ein Blitz
aus heiterem Himmel.
Creo que "salió de la nada"
es la expresión apropiada ahora.
C’est vraiment très surprenant tout ça.
Por essa eu não esperava.
Твои откровения прямо как снег на голову.