Ocean Survival: Are All the Female Classmates on the Boat at the Beginning?

[The only boy + game invasion + ocean survival + upgraded ships + multiple female protagonists + always leading] Human beings around the world were dragged into a survival game of the "Endless Abyss" by mysterious forces. Everyone with whom they were bound was teleported together, and initially owned a basic wooden boat. There is an all-devouring "black mist" advancing at a constant speed behind, forcing all fleets to keep sailing forward. The "survival list" updated in real time around the world, the ranking is linked to survival resources, forcing everyone to participate in the pursuit...