I was 28 years old, single, and had a car accident that ended my short life…or so I thought. When I woke up, I was a high school student again. My only regret in my previous life was not confessing my love to my childhood friend, whom I thought was in love with me back then, so I confessed my love to her on the spur of the moment. [Do you like me? There’s no way I’d go out with you.] I was rejected. I had no motivation to live my second life, so I made a promise to Mirai Natsuki, a girl who would commit su*cide in the near future. [When you die, I will die with you.] … After a while, the promised day came. I stood on the school’s roof with Natsuki, and after revealing our innermost feelings to each other, we climb over the rooftop railing together. ――We hold each other’s hands gently. After looking at the view before our feet, I look away from her face. I realize I am not qualified to wipe the tears from her cheeks, and I regret what I had promised her… Then I jumped off with Natsuki. This time, I thought I could finally end my life. But then, unexpected things happen――