If I were starting to gather materials for the 200% affection thing, then I'd only collect 4*/5* dupes for now. 3* dupes are *really* easy to get anyway, and would unnecessarily clog my inventory.

Thanks for the above information.
and I also hope other features like the "country mission" could be implemented not too far. It would be more fun to use these girls we've put a lot of effort to evolve and upgrade.