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...
Why did you have to go and declare 
war without consulting me first?
¿Por qué tuviste que declararles 
la guerra sin consultarme primero?
¿Por qué tuviste que declararles 
la guerra sin consultarme primero?
Pourquoi tu leur as déclaré la guerre
 sans me consulter ?
Por que você teve que ir e declarar 
guerra sem falar comigo primeiro?