Is this the WEBTOON *[Flow][1]*? (Now available as a Daily Pass series, ie wait to read for free.)

The [wiki][2] explains:

> Yun Lee-Rang is a young man with a cat anima. After being beat up and put into the hospital his cat anima is revealed to be one of the strongest animas in disguise; the White Tiger. The White Tiger anima allows him to cast a wish and he uses it to turn back time. He soon repeats the cycle of his day but several consequences were found with turning back time.

[![my god came to me 10 years ago. (Cat says:) “I can give you a special gift”][3]][3]

At the school, everyone uses their animal-based powers to fight, as seen in (for example) episodes 8-9. 

I believe the white tiger form shows up in episode 22. (Not to be confused with another character’s Bengal tiger.)

  [1]: https://www.webtoons.com/en/fantasy/flow/list?title_no=101
  [2]: https://webtoon.fandom.com/wiki/Flow
  [3]: https://i.sstatic.net/J8VLe.jpg
  [4]: https://i.sstatic.net/VBH8Q.jpg