Setsuna begins to research soot blight syndrome to understand the shocking statement Rinne makes. The endemic disease keeps the island isolated and toys with Rinne, Karen and Sara’s fates. But Rinne’s mother Kuon knows something unexpected.
Unbeknownst to others, they began to 
love each other as a man and woman.
أحبّا بعضهما الآخر كرجل وامرأة وهما
لا يعلمان بأنّهما أخوان
Doch was niemand wusste: Die beiden begannen
romantische Gefühle füreinander zu entwickeln.
Sin que nadie lo supiera, comenzaron
a amarse como hombre y mujer.
Sin que nadie lo supiera, comenzaron
a amarse como hombre y mujer.
Mais à l’abri des regards,
All'insaputa di tutti, i due iniziarono ad amarsi
come avrebbero fatto un uomo e una donna.
Ninguém sabia, mas eles começaram
a se amar como homem e mulher.
Но втайне ото всех