目が覚めたら学生時代の恋人の息子になっていた　〜社会人経験を活かして面倒事を解決したら学校一のツンデレ美少女に付き纏われるようになった～ (Associated Names)

I broke up with my first love in my first year of high school. Though I once dreamed of seeing her again, the opportunity never came. Before I knew it, twenty years had passed. And when we finally reunited… it was in a way neither of us had ever wished for.