I think that the time skip is only one year, not two.
Aya refers to two years from the time they were talking about fridges.
They had exams following this and only recently did they do their final exams.
Soooo ... I think there's a year between "fridge" reference and final exams (which the manga covers), which leaves one year of time skip to give the two years total.
I may well be wrong, and please let me know where my thinking falls down if I am.