I just learned about it through this website. I rushed here to share the news and it seems like everybody interested already knows, haha. I'm the last one to learn. However, this news makes me incredibly happy and (um) excited. This is like atomic bomb explosion, still can't believe it! The only better thing could be their reunion for some new songs and album(s). The other two things I'm longing for to happen are "Kamei Eri comeback to public/activity" and "Kago Ai divorce/public comeback/activity". I love all T&C members (it's funny how you start to love a group because of 1 member and eventually end up loving all of them, though still distinguish your first love in the group), but Ruru's appearance makes it most wonderful thing to me.
Of course, I'd love to go to the performance, since the ticket is only 4000 yen (with 1 drink included), but they start to sell tickets this Saturday (and till 19th of July), I'm afraid all tickets will be sold out in a couple of hours. Anyhow, this is the chance that can happen only once in lifetime.