Write about a character who suddenly discovers they have the ability to control time

Write about a character who suddenly discovers they have the ability to control time. At first, they use their power to fix small mistakes or relive their favorite moments, but soon they realize the consequences of altering time can be much greater than they ever imagined. As they grapple with the ethical implications of their newfound ability, they must decide how to use it responsibly while facing challenges and temptations along the way.