For a long time lol
If you want to change it back to the default, just look for one of the hamsters with more than one girl on it (Aki+Yui, Nagisa+Nene, etc.) and right-click that.
It's not just in the patch-notes either, it's also in the hamster tutorial at the beginning of the game. :P
Ren is veryyyy bad at following instructions and even worse at not following his libido :D