This is where I will offer some help in find place to help you find you what you are looking for.
There is a lot of information about TVXQ out there and of course there is all that fan love which come in many form. From fanfiction, fanart, fanvids and anyway people can pay homage to a great Band. Many of these links will be to there livejournal communities because I live here. With that said on to the links.
Keeping up with TVXQ recent activity can take hours if you go out and do manual search so here are a few site that make it easier.
For really to date information on TVXQ
OMONA THEY DIDN'T!
For up to date information on TVXQ and other Korean artist.
Arama they didn't
For Up to date information on Tohoshinki and other Japanese artist.
Up to date information on TVXQ and other Korean artist but I take what they say with a grain of salt they love some drama.
Yes YouTube you will be amazed at the thing you can find here if you do a little searching it is a gold mine of information.
Forums are a great place to meet other fan online and ask question and learn thing here are a few forums I enjoy.
My fave forum ever if you want to know what happening five seconds after it happens One TVXQ will keep you up to date.
DBSK Sleepless Night
another awesome place to get information and meet people. I found it after One TVXQ tat is why it get second billing.
There are many different types of fanfiction in this world and everyone is not always interested in the same things here I will try to be as general as possible and cover as many interest as possible.
I love fic finding communities it awesome to have a place for others to help you find that fic that you remember but don't remember. This community is not very active but I have hope for it.
Where you can find quality fanfic. I am a bit of a snob when it come to what I read. So I am always looking for good quality fic and you can find some here. Lots of different pairing available
Pretty up to date on all thinks Yunjae