A note asking for hairstyles popular among boys is found in the suggestion box.
In order to fulfill the request for the opinions of boys from Southern Middle School, Riko searches her cram school for boys from Southern Middle School and comes up with Nagi.
A lot has changed since 
we started the love lab,
Muchas cosas han cambiado desde que 
empezó la investigación de amor,
Han cambiado muchas cosas desde que 
empezó la investigación del amor,
Beaucoup de choses ont changé
 depuis qu’on a commencé à étudier l’amour,
Muito mudou desde que começamos
 o laboratório de amor,