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...
Besides, Riko, you joined on the 
condition you wouldn't do any work.
Además, tú te uniste con 
la condición de no trabajar.
Además, tú te uniste con 
la condición de no trabajar.
En plus, j’avais promis à Riko
 qu’elle ne travaillerait pas.
Além disso, Riko, você entrou com a 
condição de que não faria nenhum trabalho.