This is kinda late but it was really easy to understand.... people make a wish to their gods and the mc still havent made one yet not until he was heavily injured but some bullies. His g** (a white tiger that disguises as a cat) granted his wish and managed to avoid the incident but instead, a monster appeared and killed his friend. Now his grandfather knew turning back time is impossible for a cat g** an immediately gets him into the school where students were taught how to control their powers