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...
Yeah, it's me. Can I keep 
Kuro-kun with me tonight?
أجل، هذا أنا. أيمكن لكورو-كن أن يظلّ معي اللّيلة؟
Ah … Ich bin’s. Darf Kuro
heute hier übernachten?
Sí, soy yo.
¿Puede pasar Kuro la noche aquí?
Sí, soy yo.
¿Puede pasar Kuro la noche aquí?
Hé, c’est moi !
Kuro peut rester ici, ce soir ?
Sì, sono io. 
Questa notte Kuro può rimanere qui?
Oi, sou eu! Posso ficar com
o Kuro-kun esta noite?
Да, это я. Можно Куро
сегодня переночует у меня?