In the spring of my 26th year, after dating for ten years since I was a high school sophomore, I proposed. Her answer: she would marry my younger brother, not me.

My younger brother, a perfect human being and my complete opposite, had been having an affair with my girlfriend for the past ten years.

Overwhelmed with despair by this life-shattering betrayal, I threw the ring into the sea. But somehow, time rewound to ten years ago, to when I was a high school sophomore—even before I started dating her!

Now back in the past, I will embark on a new life—while exacting revenge on my brother and the woman who betrayed me!