Aside from boosting girls' ranks in competitive games, Yang Yu had also played numerous online games where investing money could make you stronger, which were mostly recommended by the "girls" he carried.
As a gamer who felt perpetually stepped on by the Goddess of Fortune, the only way Yang Yu saw to compete with the Luck Emperors and tycoons in some unbalanced online games was through the game's free-trade system, by wheeling and dealing.
It was around that time that Yang Yu set his sights on becoming a cunning in-game merchant, delved into the study of economics, sought to understand the mechanisms of the economy, and attempted to find a way to overturn his fate and amass his initial capital.
After society's continuous and brutal reality checks, eventually... Yang Yu chose to give up.
To be clear upfront.