The ones harassing Riko and her friends were "former" student council president Enomoto Yuiko (Eno), whose work was stolen by Maki, and her friend and student council treasurer Mizushima Sayori (Sayo). Declaring war on Riko and her friends, Eno and Sayo sneak into the student council room where they discover materials related to the love lab.
Meanwhile, Maki takes on all the responsibilities of the student council herself and collapses from the strain...
But it doesn't make sense 
that Maki's the president—
Como sea, no tiene sentido 
que Maki sea la presidenta.
Bueno, no tiene sentido que 
Maki sea la presidenta.
Tu sais, c’est le fait que Maki soit présidente
 qui est anormal.
De qualquer jeito, não faz sentido 
que Maki é a presidente—