The World Is Flooded: I Have a Doomsday Cruise Ship

Apocalypse + natural disasters + rebirth + superpowers + revenge + no saintly do-gooder + no System Disaster struck, throwing the world's climate into chaos. A once-in-a-century deluge hit as the polar ice caps rapidly melted, and floods swallowed Blue Star in a single day! In his previous life, Li Yan let his softhearted nature get the better of him. He took in his neighbors and helped them find supplies, only to be cruelly murdered in the end! Time turned back, and Li Yan was reborn ten days before the apocalypse. He also awakened the ability to adapt to underwater conditions. In this life, he swore never to show anyone mercy again. He would live for himself alone! Not enough supplies? No problem. He rented two warehouses and stocked them with mountains of goods. He could also dive underwater to salvage supplies whenever he wanted, and fish from the surface! Poor living conditions? No problem. He paid a fortune to rent a luxury cruise ship and kept enjoying the life of a rich man! Life in the apocalypse getting dull? No problem. He had plenty of ways to entertain himself, and could even sail around the world! When his ex-girlfriend and neighbors begged him desperately for help, Li Yan just chuckled. You can die for all I care. What does it have to do with me? My supplies? I'd sooner throw them away or feed them to dogs than give them to you, even to wipe your asses!