For those who like to explore, there are places of interest throughout Onigiri. Visiting these places will reward you with presents ranging from ryou boxes to torn gacha ticket. The presents are redeemable from alt > my character > achievement. This guide will provide the list of the places. Feel free to help this guide by posting the location of the places. Have a nice day.
EDIT: view here viewtopic.php?f=10&t=9362