After Falling Off a Cliff, I Transmigrated into the Tomb Raiding World and Became an Underground Boss

Not an invincible hero, not a power fantasy. There’s a System and a couple, and the story aims to make up for the regrets of the original. My name is Lu Chuan. I’d lost the courage to keep living, but luckily, I gained a System and met the right person. Unluckily, I transmigrated into a tomb-raiding world, and was dragged into a tomb bound hand and foot. I need help, fast!