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 had no idea you liked work so much.
No pensé que te gustara tanto el trabajo.
No pensaba que te gustara tanto el trabajo.
Je ne savais pas que tu aimais
 autant travailler.
Eu não tinha ideia de que você 
gostava tanto de trabalho.