At the End of the World, I Traveled to the Cretaceous Period? !

I was inexplicably transported to the Cretaceous Period and lost my memory. Sudden biological mutation, an extremely ferocious creature came to the world, and both humans and dinosaurs will face extinction. My partners and I built the last laboratory in the world. When facing the challenge of unknown creatures, bizarre cases also happened... In short, the plot is very confusing. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.