Deep Sea Trek: I Bring Black Technology to Fight Against Old Players

Different world + survival + multiple female protagonists + black technology + collecting supplies. There is something in the depths of the ocean. Although humans have explored the world for a long time, is our world real? Lear is a child from an ordinary family. One night, late at night, he went to a world he had never seen before. And when he explored inside, he discovered that he seemed to have had a wonderful dream...