Died in a hospital, woke up in another world. What's more, my father is a cat-person. Am I half-cat?

I recall, before I died, the four of us who were hospitalized together made a promise: "If we're reborn in another world..." Let's find everyone! Our password is 【Ri4】.

But wait... has everyone truly reincarnated?

The adventure of the protagonist, 【Lin】, reborn as a cat, begins.