I'm not the type of person who leaves reviews on a manga or anime and prefers rating it with number but I'll make an exception since I love this masterpiece. It's all about a man who died and traveled back time. When his spirit traveled back 12 years ago, he faced and did some things he hesitated and hadn't on his previous past which somehow made an impact on his new future, and there he made a new future, a future with no regrets. So long story short, I loved it and the angst part was a bonus. I also love how it showed thedifferent point of view, not just the uke or the MC but also the seme or the senpai who teased him.