RACCOON

After getting revenge on the Thulcaan Empire, Jack Valantier took his last breath. But just when he thinks it's all over, he finds himself transported back to when he was 14! From his negligent and wicked family to his loyal servant and caring sister, it's all just as he had remembered. But this time, Jack is armed to the teeth with decades of experience from his previous life! He's ready to give them hell, and those that have wronged him will pay dearly. Because this time, he's invincible.

A webtoon in the isekai genre where you become a pet, guaranteed to make you feel like flying high. This is the story of a middle-aged man who is reincarnated as a horse in the world of a novel he once read. Along with that, he’s stuck with a system that forbids him from going OOC (out of character) in his horse form. On top of that, there are characters acting like NPCs, constantly giving him quests to complete.