Read manga: Pochi Gokko.

manga
Summary:

A promising romcom from Weekly Young Jump, the first taste of fluff in the Reiwa era.One day, the protagonist Tomoyori decides to end his own life.But that was not the end - as his eyes opened, he found himself in a strange room.Turns out, he's now the pet of a mysterious high school girl. Yes, you heard that right.Interacting with a high school girl? Could this be a gift from the heavens? Or is it divine punishment?A new era, a new beginning!