Saikawa, Natsunagi, and Kimizuka set off on a cruise together, during which Kimizuka unexpectedly encounters a former acquaintance. It turns out that something precious is onboard the ship, something which attracts the wrong sort of attention.
If that's the case...
...في هذه الحالة
Dann müssen wir …
Si ese es el caso…
Dans ce cas…
Se é esse o caso...