What a cute, happy little picture. I added a few more tags: the third volume of the K-on! manga in front of Mystia, My Melody on Rumia's PJs, the Hirake! Ponkikku containers over in the left corner, etc. Anyone have a clue what Daiyousei's pajamas say?
Also: is there a tag for when artist's reference their own artwork in other pieces? I've seen this done on various occasions, but never knew how to handle it. In this case, the pictures on the bulletin board are post #632532, post #605184, and post #587570.