If you could live forever, would you?

Imagine a world where when an individual turns eighteen years old, they can press restart on their life and live it out again. However, they do not rewind time. Instead, the world around them continues to move forward. Others that have not pressed restart continue to age and move on with their lives. And, perhaps worst of all, all of their memories are erased, starting their new life with a clear mind. Motivated by nostalgia and fear, people make the decision to press restart every day. This time, it's Kira's turn, and it will be the hardest decision of her life.