Reborn as a Cannon Fodder Skeleton, I Develop and Raise School Beauties

In 2126, Lin Yuan, a genius scientist from Blue Star, was accidentally sucked into a crack in the abyss. Traveled to another world and became an F-class cannon fodder skeleton. Summoned by the school beauty from another world. The underworld was developed. Build mechas, seize territory, build factories, and expand your power. Build an undead star fleet. Dominate the stars and return to Blue Star. But found...