In anticipation of Mothers Day, Gravity is sponsoring an online event, the "Letters of Love" loading screen event:

As we look forward to May 4th, and Mothers day we would like to announce the coming of the "Letters of Love" loading screen event. Users who wish to participate in this event will need to submit a letter of appreciation for ones mother and an image that will be used with the letter for a loading screen as well as character names of son/daughter and mother. We will pick 8 letters and images to be used during the week of May 4th ~ May 11th. The winning submissions will each receive an offline prize of the Official Fan Art Collection Vol. 1. We will be accepting the loading screen submission starting April 23rd through April 27th. Announcement for winners will be made on May 3rd.

The full text of the announcement is here.  Visit the official Ragnarok Online site by clicking this link.