My first love, a senior at high school, got married... If only I had confessed then... Yes, I was heartbroken, but suddenly I was transported back to my days at high school. In order to avoid any regrets, I confessed this time and was able to go out with my senior, but... a sudden tragedy occurs... In order to change that future, I have to repeat the time leap... Will I be able to change my fate this time and be happy with the person I love the most?