While Others Cultivate, I Use My Multiverse System - Chapter 4: Rewards

A Federation Colonel with abnormal thoughts was locked in a dark room and met a little looney.

“Your whole body emits a scent that I dread (covet) and fear (desire).”

A frigid Colonel X little looney roommate: A sweet story of interstellar travel

- Description from Novelupdates

In a world teeming with Titans, Colossals, Gigantic Monsters and Kaiju's, Erian who reincarnated makes his living collecting scraps of low-grade Defective Genetic Serum, realised he transmigrated along with his system.

Follow Erian as he grows to become the strongest Disaster Grade Titan with the help of his Titan System!

【The most sensational fantasy novel on the web, with over a billion clicks – highly recommended!】To seize the 'Source of All Things', a treasure that could propel one into the realm of gods, the great Nine Nether Heavenly Emperor fell. Reborn as a youngster named Shifeng,watch how Shifeng, with the revived memories of his former life, eliminates geniuses from all around, captures the essence of heaven and earth, and climbs atop piles of bones back to his throne of an emperor!