Rio learns that his mother's ears have turned into pot stickers because his older brother Yuu was kidnapped, and Rio feels responsible for what happened. When Rio nearly falls off a cliff while searching for Yuu, Ramune throws himself in harm's way to protect him and ends up badly injured. In order to save Ramune, Rio uses the Pearl of Night Voices he received from Ramune to treat his mother, desperately calling out to his mother, who can't hear his voice.
The pearl can be melted by 
speaking directly to each other.
.يمكن أن تذوب اللّؤلؤة بالحديث مع بعضكما مباشرة
Und um die aufzulösen,
musst du direkt mit jemandem sprechen.
Pour ce faire,
il faut vous parler en face à face.
La perla può essere sciolta 
parlando direttamente l'uno con l'altra.
Pra derretê-la, vocês devem
conversar diretamente.
Жемчужина растворяется
от прямого разговора.