Yui, Yuuya, and Cryska are trapped on a deserted island in the middle of a terrible rainstorm. With potentially a full week until they're found by the rest of the military, they're forced to try and work out their differences from the confines of their small cave...
You must have something you 
don't want to say to others,
Apuesto a que tú también tienes 
cosas que no puedes decir o que
Apuesto a que tú también tienes 
cosas que no puedes decir o que
Aposto que você também não fala de certos assuntos,