Kuro's classmate Aona is troubled by the popcorn that keeps popping out of his head. Aona says it makes him sad when the popcorn disappears, so Ramune lends him a bag that can be used to store the popcorn. Why is Aona's head producing popcorn, and why does he feel sad when it disappears? Ramune tells Aona that the treatment method will become clear if he asks himself those questions...
why don't you express 
more interest in others?
لمَ لا تعبّر عن مزيدٍ من الاهتمام بالآخرين؟
du solltest ein bisschen mehr Interesse
an den Gefühlen anderer zeigen.
Pourquoi tu ne montres pas
plus d’intérêt envers les autres ?
perché non mostri 
maggiore interesse negli altri?
Por que você não tenta mostrar
mais interesse nos outros?
проявляй бóльшую заинтересованность
по отношению к другим.