When starting Atelier Rorona Plus on January 1st, a voice clip of Rorona will play that says, "Happy New Year! I'm ready for it if you are!"
Have a saved game file from the indicated game to unlock the corresponding item.
If you want the extra costumes that you buy with tickets you can just save before buying them, then after you buy them reload from that save and you will have the costumes unlocked and still have the tickets.
Complete the following tasks to unlock PlayStation trophy rewards.
Additionally there are fifty three secret trophies.