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.
I swear it by this heart!
!أقسم بهذا القلب
Das schwöre ich bei diesem Herzen!
¡Lo juro por este corazón!
Je le jure sur mon cœur !
Juro por este coração!