A brief description of the Yankee Wa Isekai De Seirei Ni Aisaremasu manga:
Manai Zero is a high school student in his second year of study. He recently transferred to a new school, where he became known as the most powerful high school student. Honestly, he didn’t like it at all. Walking home, he saw a boy running along the road for a ball, and a truck rushed at him. Manai pushed the boy away, thereby saving him, but, unfortunately, he lost his life. A little later, he comes to life in a mysterious library. There he sees a strange bespectacled man who appears to be God and invites Manai to reincarnate. Our hero, of course, agrees and sets off for a new, wonderful world of adventure!