As part of a morale-building exercise, Argos Flight is sent to the Caribbean for a photo shoot. During a boat race, Yui, Cryska, and Yuuya are stranded on a deserted island. Cryska gets sick, and an injured Yui tries to force herself to help, but the rain is getting worse...
but since we don't know the 
cause, there's reason to worry.
Ya que no sabemos la causa, 
sigue siendo preocupante.
Como no sabemos la causa, 
sigue siendo preocupante.
mas como não sabemos a causa, estou preocupada.