Look, I don't know what to tell you. This is a parody of a manga that has been running for more than forty years. If you have seen Glass Mask or read the manga, then you will laugh at this send up. If you have no familiarity with either, go forth and watch and read, because they are perfect encapsulations of classic shoujo. There are send ups of almost every repeated character tick in the show- the white eyes when someone realizes something, Tsukikage-sensei's shocked cane drop, Maya literally eating something to learn how to act like it, etc etc. Be prepared for some bait andswitch humor too- the show will pretend to be an episode about say, studying for exams and then it will show how characters from the 70s react to the concept of a all-you-can-drink restaurant. Once you realize that nothing serious will ever get addressed, you'll be happier.

For the people complaining, it's like you pointed to something on the menu you didn't read with a cow next to it and you are mad it turned out to be a milkshake instead of steak.