Isekai Tensei… Saretenee!

Yuuki Kousuke thought his life was over when he died on his first day of high school while trying to save someone. But fate had other plans—the old man he helped turned out to be a god. As a reward, he was given the chance to reincarnate in another world. Excited to live like the overpowered heroes from his favorite isekai stories, Kousuke was shocked to wake up right where he died. Now, armed with a cheat ability from the god, he expects a peaceful modern life… or so he thinks. Turns out, the cat he rescued was also a god. (Source: MangaUpdates)