Kim Jongin absolutely hates taking things seriously. He doesn't know the meaning of hard work, and always chooses to take the easy way out. 

And so imagine his irritation when he finds out that he has to spend his whole afternoon staying back in school (he had better things to do than that, for instance playing video games).

But instead of his wrinkly-old home economics teacher, a doe-eyed, neat-looking male greets his sight when he enters the food laboratory after his homeroom teacher had stopped him from leaving the school — to which he rolled his eyes in annoyance.

His lazy- decides to just get the task over and done with, so that he could finally leave the place he liked to call a hell-hole.

But gone are his initial motives, and he finds himself facing another problem, other than the task of baking a cake.

Which is the very own teacher's assistant, Do Kyungsoo.