Kanojo wo Dere saseru Houhou wo, Shourai Kekkon suru Ore dake ga Shitteiru

Q: Why did you choose this high school? A: Because my future wife is enrolling here. When I woke up, I had time-leaped 15 years into the past. Standing before me was Yuki, my future wife, wearing a school uniform. In the original timeline, we wouldn't meet until we became adults and eventually got married, so we're still strangers for now. But I know that she distrusts people, has no friends, and spends her school days alone. I also know she'll deeply regret that time in the future. So this time, I'm going to rewrite her youth. "How do you know my secret!?" "Because we're husband and wife...