Momo and Nana suggest composing the student council's responses to requests for romantic advice found in suggestion boxes as short stories in the "Love Lab Correspondence" of the underground paper.
you shouldn't forget 
your memories together!
no deberías olvidar sus momentos juntos!
no deberías olvidar vuestros momentos juntos!
que tu dois effacer son souvenir.
você não deveria esquecer suas memórias juntos!