Though it hasn't been confirmed by SM Entertainment, it seems like the boys are coming back with their fourth album soon. They hinted this back in January but there hasn't been much development beyond that. Shindong's Twitter recently posted, "Ah! It's hard preparing for the 4th album!!! Let's be strong!!! Ah!!! I'm hero ho girl!!! Ah!!!" Also, we reported on Eunhyuk's birthday a couple of days ago and in the photo, we saw some unfamiliar faces so I'm guessing they're working on the album as well. Lastly, Shindong has been tweeting away about his Danish Diet. Korean celebrities usually go on diets before their comeback. So even though nothing if official, it seems pretty clear they've been working on their fourth album. Hopefully the release it very soon.