My Grateful Fox Immortal is Filthy Rich

One lightning strike. One fox saved. Now she's a supernatural billionaire determined to repay her debt—and she doesn't do anything halfway. I jokingly asked for a 50-50 business partnership. She took my startup public overnight. The school beauty who rejected me? Suddenly interested. My childhood friend? Still patiently waiting. But when the fox spirit discovers my mother's terminal diagnosis, she drops a bombshell: "Your mother's cure requires time travel." Me: "...Is that covered by insurance?"