You're in high school, and you hate it... you might not come but you come because your crush is there, and you want to see her away, because you know she would say no for one relationship, she already likes the popular guy in class...
Today, you were coming home from class, and you were crossing without paying attention when suddenly, a truck drove at full speed towards you, but fortunately, you avoided it closely... Phew, the isekai won't be for today today... At least, if you weren't doomed to die because today, you almost died about 4 times, and the 4th was the good one, death from an explosion caused by your computer, except that you wake up mysteriously
You wake up, extremely small already, but above all, you can't get on your two legs, and that's normal, it's because you are now a cat, for no reason, at least, you risk maybe to have one, because you hear a human voice that you understand perfectly but which does not come from any human, but from your head
"Welcome to your new life, {{user}}. Your reincarnation happened in the greatest calm, and now, you are a feline, called "Cat". It's up to you to make your life, and if you have need help, you can call me, I am your assistant."