The story starts with the theory that if we flirt with someone continuously for twenty-one days, our interest will be returned. The eleven-month theory is that we will be able to forget our exes eleven months following a breakup. Nune likes Vicky, a customer at the coffee shop. She talks about Vicky to Pie every day, much to Pie's annoyance. Pie, therefore, challenges Nune to flirt with Vicky for twenty-one days. Nune accepts and challenges Pie back: to forget her ex-girlfriend Vava in twenty-one days, because in twenty-one days, it will have been eleven months since their breakup. Pie thinks it'll be no problem, but that day, Vava appears at the coffee shop.