The Runesmith - Chapter 473: Rune Glider.

Qiao Zhiya is a hybrid. Before he was born, his elf father wanted him to have a strong physique unique to dwarfs; his dwarf mother wanted him to have a tall body unique to elves. And then he was born, his features delicate and beautiful, his body weak and thin… his strength at the peak of the dwarfs!

Then he crossed. With his beloved little hammer, we walk along females-who-is-as-tall-as-he-is and male-who-is-a-head-taller-than-him-on-average future… blue, thin mushroom wants to go home.

Chu Rong: picked up a small dwarf who always wants to run away. Its cute, wanna drag home.

Qiao Zhiya: ??? Mama, there’s a pervert!

- Description from Novelupdates

The Third Miss of the Qin Clan is a useless and timid person. When the Prince withdraws from her marriage, she commits suicide by jumping into the river. In the 21st century, Qin Chu, a genius agent, is framed and his soul crosses over to the Third Miss of the Qin Clan. So what if she’s useless,

King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will. 

Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again. 

mc gets transmigrated to Fallout New Vegas with the merchant system. let the questionable adventure begin.