I Was Taken Away by the Beautiful Landlady in Raft Survival?

No warning, no explanation. In 2147 AD, a white light swept across the entire earth. When the light dissipated, more than 7 billion humans around the world were collectively transported to a strange and different world. There is no land in this world, only endless ocean. Each survivor is randomly assigned to a dilapidated raft, in groups of three, scattered across the vast sea. The teams were separated by at least 50 nautical miles and initially could not see each other. There are no system announcements. No one behind the scenes jumped out and announced, "You've been chosen." No one knows why, no one knows who did it. Everyone just appeared out of thin air on the sea, sitting on a broken raft, looking confused. A black tower-shaped mark appeared on the back of each person's hand. No one told it what it was for. Everything about the tower, everything about the list, and everything about the rewards are all figured out by the survivors themselves - with blood and lives. The protagonist of the harem novel is decisive in killing and never a virgin