Spring is here and the graduating students are planning a trip to sunnyOkinawa.
Shizuku and Honoka have invited Miyuki and Tatsuya to a party thatsounds like the
perfect opportunity to relax for once. It sadly won'tbe all fun and games because the
siblings have also been tasked with stoppinga terrorist plot while they're in the south
islands. What are thechances? Romance is in the air and danger is on the horizon-this
is sure tobe a vacation to remember!