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...
I thought you just wanted 
to be the treasurer again!
¡¿No solo querías ser 
la tesorera de nuevo?!
¡¿No solo querías ser 
la tesorera de nuevo?!
Ton objectif était pas
 de redevenir trésorière, alors ?
Eu pensei que você só queria 
ser a tesoureira de novo!