This manga totally made my day back then. It's already over than 10 years ago when I bought this series in my country.
The one that I had is kind of prequel, not a report.
As you can see from the very first chapter, it is immediately told all of his hamster daily life. And some flashback as reminder.
The prequel had total 2/3 volumes (sorry, I forgot, I've sold the comics) and the data is not available on mangaupdates.
I guess it will get a bit confused when start reading this, kind of...all of a sudden.
The prequel telling the beginning of their encounter, many silly and troublesome things, until the struggle to find a mate. It is really funny.