It doesn't get stacked up..Once the event is over the number of ramens you have is reset to 0. Similar is the case with mission gift boxes and lucky vouchers. As for the one ramen you had, its from logging in, as first login of a day gets you one ramen.
This wasn't the case with the Ramen event. I forgot to use mine on the previous ramen event and was able to keep it.
Log in in order to Post. LOGIN | Register