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...
Of all the things I know, that's the one 
I have the most trouble understanding.
Eso es lo que no puedo comprender 
de las cosas que sé.
Eso es lo que no puedo comprender 
de las cosas que sé.
De tudo que sei sobre você, há algo que eu simplesmente não entendo.