On the picture in chapter 1 page 2 what's the manga called? PLEASE HELP

If you mean the credit site, you can look it up at the page of the scanlation group: http://fujoshigeneration.com/gg-graphics/credit-recruit-pages/ ^^

Durarara, but it's actually not a yaoi , that was from some doujinshi or is simply a fan art,and the couple is Shizuo x Izaya .There are many works dealin' with them.