The lunch mac is for a set of various burgers and "McDonald's potatoes" and "drinks" (each M size). If you add 60 yen (tax included), you can change to each L size set or "salad" and drink L size set.
In addition, with the start of the daytime Mac, the current "McLunch" will end.
The target burgers and set prices are as follows.
[350 yen]
Cheeseburger, chicken crisp
[450 yen]
Double cheeseburger, bacon lettuce burger, chicken filleo, teriyaki mac burger, filet-o-fish
[550 yen]
Big Mac, Quarter Pounder Cheese, Shrimp Phileo