What is the name of the manga in the bottom right of this picture?
I have reverse googled the bottom right corner of the picture to see if I got any results with the dude there. Closest I'm getting to the answer is the website of Shounen Sunday [archive.org on 2014-12-30]

If you scroll down a bit, you can see him sitting there. Searching for the title 闘獣士 on mangaupdates reveals that it is Toujuushi.

The cover says that it is the serialization of the 3rd episode of the story, which matches the description on mangaupdates.