>>85177701Each burger ranges from 400 to 480 calories, and if you have all three, it adds up to 1350 calories. That’s quite a bit for one meal, but still manageable. You'd still have room for three onigiris for dinner and remain in a caloric deficit, assuming your daily intake is 2000 calories. No need to fast.
I'd skip the variant with cheese and only get the plain one without cheese and the one with special sauce. Do however get the mocchi anko pie. Those time limited pies are usually pretty decent.