You know how, in the Spring, children have to be content with hard boiled eggs dyed in food coloring? When you were a kid, no one could trust you with anything more elegant because you were a monster and you would have smashed something like a blown or carved egg.
This candy bar is like that. When you were young, you had to eat Kit Kats. The chocolate is off-puttingly thick and the wafer layers are hastily smashed together. But it was fitting, because you were a brute.
Now that you're an adult, we can trust you with more graceful and refined things, like Kägi-fret. The chocolate is thin and the wafers are delicate and thoughtfully arranged You've earned this superior candy by proving that you could handle the Kit Kats. Congratulations! Dig in.
(P.S. While googling for a link, I discovered that in the US you can buy these just under the name "Kägi" - my "Kägi-fret" must have sneaked in from overseas! The scamp!)