From Villain to Virtual Sweetheart: The Fake Heir's Grand Scheme(BL) - Chapter 228: Watching From the Sidelines

A mysterious black card issues a different amount of money each week and Shi Lei must spend it all within a week’s time. Otherwise, he will be welcomed by the black card’s punishments.

“Spending money is really tiring.” —- Shi Lei said.

“I will set a small goal first, such as spend a hundred million……” —- Shi Lei said in self-satisfaction.

“The one thing I regret the most in life is having infinite money to burn without a choice.” —- Shi Lei finally said.

- Description from Novelupdates

A side story series featuring the girls of Kyoukai Senjou no Horizon.

A world where men don’t exist. A kingdom ruled by powerful, dangerous women. And Henry the only male in existence has just landed in the middle of it.To some, he’s a treasure. To others, a possession. But to Lady Seraphina, the most powerful woman in the realm? He’s hers. Whether he likes it or not. Now, trapped in a world of seduction, power, and deadly intrigue, Henry must survive forces far beyond his control before he loses more than just his freedom.