The Villainess's Guide to Winning the Male Lead - Chapter 104

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

Ethan Carter, a failed office worker from his past life, wakes up as the spoiled heir of the Carter family—a young man infamous for his laziness and scandals. Armed with the Cheat Investment System, which can predict future market trends, Ethan sets out to transform his life from a disgrace to a legend.As he climbs the ladder of success, Ethan must face ruthless rivals, scheming family members, and the brutal corporate world. With each step forward, his empire grows larger, but so do the stakes. Will Ethan use his newfound power to crush his enemies and secure his legacy, or will his ambition lead to his ultimate downfall?Follow Ethan’s journey from a “worthless heir” to a world-changing tycoon in this epic story of wealth, betrayal, and redemption.

Collection of short stories.

- Description from Novelupdates

This is a story of a modern man returning to ancient times, returning to a real world without any extraordinaryness, and slowly rising by relying on the ability to attribute all data.

- Description from novelbuddy