I searched and there's not HYE Thread, so let's start:

Summoned into an alternate world of Alayzard, Akatsuki Ousawa helps to defeat the demon king (魔王 Maō), brings harmony back into the world, and under the demon lord’s last request, takes the demon’s only daughter back into Akatsuki’s own world. It turns out that being teleported into a different world is somewhat of a common occurrence. Those who find themselves back home often come back with the power to use magic and the world organization fearing people like Akatsuki created Babel, a school to teach and keep tabs on the magic users. Akatsuki is able to pull the demon lord’s only daughter into Babel as his sister, Myuu Ousawa. A new chapter for Akatsuki is about to begin in his own universe.

This a a Ecchi/Romance/Fantasy/Action Anime and pretty funny one.

The Main Character is the greatest perver ever, so if you like all that i said as far, just go and watch it!

Here's a little preview of what you will see in this anime:
http://www.youtube.com/watch?v=Vpg8L32ZSkw