UPDATE: Line Play Event Item

LINE PLAY UPDATE
     Before continuing, if you do not play LINE PLAY, you may want to read the review.

     There is a special Skeleton Mask available on LINE PLAY for a limited time.  You can only obtain this item between 7.30 and 8.05 2015.  In order to obtain this item you will need to change your language settings in the application.  You can use this tutorial, if you are unsure how to do this.
     Once your language settings are switched to Japanese, reload the application and go to your Diary page.  Create a new post.  Write only this text:

#hfes2015

     Then add a photo of your avatar in scary clothing.  Do not go to your closet and save a picture of your avatar from there, then edit with the phrase.  It only works if you create the post and enter the text first.  Then add an image... and save.
     You will get a message saying that Cherry sent you a gift right away.  The gift is the skeleton mask, which you can see in the screen shot to the left.
     It enters your image in a scary costume contest.  If you are one of the ten finalists you will also receive a black ghost avatar item which can be seen above and to the right.
     There is also a white ghost mask and white ghost effect.  These can not be obtained if you are in the US.  The white ghost mask is available to regions in JP and EU by entering the code "HORROR15" into the Gift Code Event space.

Enjoy your skeleton mask!