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...
Mom is in the hospital 
because her heart hurts.
.أمّك في المستشفى لأنّ قلبها يؤلمها
La mamma è in ospedale 
perché le fa male il cuore.
A mamãe está internada porque
está com o coração apertado.
Мама в больнице,
потому что у неё болит сердце.